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Chemical Structure| 6914-71-2 Chemical Structure| 6914-71-2

Structure of 6914-71-2

Chemical Structure| 6914-71-2

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Product Details of [ 6914-71-2 ]

CAS No. :6914-71-2
Formula : C7H10O4
M.W : 158.15
SMILES Code : COC(=O)C1(CC1)C(=O)OC
MDL No. :MFCD00192079
InChI Key :PWLLZZMFFZUSOG-UHFFFAOYSA-N
Pubchem ID :2769539

Safety of [ 6914-71-2 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335-H412
Precautionary Statements:P261-P273-P305+P351+P338

Computational Chemistry of [ 6914-71-2 ] Show Less

Physicochemical Properties

Num. heavy atoms 11
Num. arom. heavy atoms 0
Fraction Csp3 0.71
Num. rotatable bonds 4
Num. H-bond acceptors 4.0
Num. H-bond donors 0.0
Molar Refractivity 35.96
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

52.6 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

2.16
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

0.48
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

0.05
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

0.21
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

0.83
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

0.74

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-0.86
Solubility 21.9 mg/ml ; 0.138 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-1.15
Solubility 11.1 mg/ml ; 0.0702 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-0.84
Solubility 22.9 mg/ml ; 0.145 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble

Pharmacokinetics

GI absorption?

Gatrointestinal absorption: according to the white of the BOILED-Egg

High
BBB permeant?

BBB permeation: according to the yolk of the BOILED-Egg

No
P-gp substrate?

P-glycoprotein substrate: SVM model built on 1033 molecules (training set)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

No
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

No
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

No
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

No
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

No
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-6.92 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

1.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.55

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

2.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<1.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

1.56

Application In Synthesis of [ 6914-71-2 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 6914-71-2 ]

[ 6914-71-2 ] Synthesis Path-Downstream   1~54

  • 4
  • C8H13LiO4Se [ No CAS ]
  • [ 6914-71-2 ]
  • [ 127628-39-1 ]
  • 5
  • C8H13NaO4Se [ No CAS ]
  • [ 6914-71-2 ]
  • [ 127628-38-0 ]
  • [ 127628-39-1 ]
  • 6
  • methyl 2-carbomethoxy-2-potassio-4-methylseleno butyrate [ No CAS ]
  • [ 6914-71-2 ]
  • [ 127628-38-0 ]
  • [ 127628-39-1 ]
  • 7
  • [ 107-06-2 ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
YieldReaction ConditionsOperation in experiment
79.7% With tetrabutylammomium bromide; potassium carbonate; Comparative Example 2 Dimethyl 1,1-cyclolpropanedicarboxylate without polyethylene glycol/derivative addition 450.3 9 of 1,2-dichloroethane (4.55 mol) and 168 g of potassium carbonate (1.2 mol) were initially introduced and the reaction mixture was heated until the 1,2-dichloroethane refluxes. 99.1 g of dimethyl malonate (0.75 mol) and 1.25 g of tetrabutylammonium bromide (3.88 mmol) were then added at the boil. Water formed during the reaction was removed by azeotropic distillation with 1,2-dichloroethane throughout the reaction. After a reaction time of 5 hours, the reaction mixture was cooled and separated off from the reaction salt by filtration. By means of fractional distillation, 1,2-dichloroethane was obtained at a reduced pressure and dimethyl 1,1-cyclopropanedicarboxylate was obtained at up to 10 mbar (=100 Pa). The yield was 79.7percent.
  • 8
  • [ 106-93-4 ]
  • [ 108-59-8 ]
  • [ 75-21-8 ]
  • [ 6914-71-2 ]
  • [ 107-21-1 ]
  • 10
  • methylphenylvinylselenonium tetrafluoroborate [ No CAS ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
  • 11
  • ethylphenylvinylselenonium tetrafluoroborate [ No CAS ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
  • 12
  • [ 6914-71-2 ]
  • [ 37773-10-7 ]
  • [ 74-88-4 ]
  • [ 113020-26-1 ]
  • 13
  • [ 700-58-3 ]
  • [ 6914-71-2 ]
  • C16H22O4 [ No CAS ]
  • 14
  • [ 2550-26-7 ]
  • [ 6914-71-2 ]
  • 6-Methyl-2-oxo-6-phenethyl-tetrahydro-pyran-3-carboxylic acid methyl ester [ No CAS ]
  • 16
  • [ 6914-71-2 ]
  • [ 108-94-1 ]
  • 2-Oxo-1-oxa-spiro[5.5]undecane-3-carboxylic acid methyl ester [ No CAS ]
  • 17
  • [ 6914-71-2 ]
  • [ 830-13-7 ]
  • 2-Oxo-1-oxa-spiro[5.11]heptadecane-3-carboxylic acid methyl ester [ No CAS ]
  • 18
  • [ 6914-71-2 ]
  • [ 98-86-2 ]
  • 6-Methyl-2-oxo-6-phenyl-tetrahydro-pyran-3-carboxylic acid methyl ester [ No CAS ]
  • 19
  • [ 6914-71-2 ]
  • [ 67-64-1 ]
  • 6,6-Dimethyl-2-oxo-tetrahydro-pyran-3-carboxylic acid methyl ester [ No CAS ]
  • 20
  • [ 6914-71-2 ]
  • [ 96-22-0 ]
  • 6,6-Diethyl-2-oxo-tetrahydro-pyran-3-carboxylic acid methyl ester [ No CAS ]
  • 21
  • [ 6914-71-2 ]
  • [ 2043-61-0 ]
  • 6-Cyclohexyl-2-oxo-tetrahydro-pyran-3-carboxylic acid methyl ester [ No CAS ]
  • 22
  • [ 6914-71-2 ]
  • [ 762-72-1 ]
  • [ 93185-10-5 ]
  • 23
  • [ 6914-71-2 ]
  • [ 102-04-5 ]
  • 5,5-dibenzyl-2-methoxycarbonyl-5-pentanolide [ No CAS ]
  • 24
  • C14H18 [ No CAS ]
  • [ 6914-71-2 ]
  • dimethyl spiro<2,4>heptane-4,4-dicarboxylate [ No CAS ]
  • 25
  • [ 105-34-0 ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
  • [ 38806-09-6 ]
YieldReaction ConditionsOperation in experiment
Example 1 Dimethyl cyclopropane-1,1-dicarboxylate 2.1 mol of DMM, 6.6 mol of EDC, 2.4 mol of potash having fractions of 87percent by weight with particle sizes of <0.1 mm and fractions of 78percent by weight with particle sizes of <0.05 mm and 6.5 mol of DMF are taken in a reaction vessel having a stirrer and distillation attachment with condenser and phase separation vessel. The mixture is heated to 110° C. with stirring, water of reaction distilling off azeotropically with EDC. The water of reaction is taken off as the upper phase, and the EDC, the lower phase, is recycled to the reaction. After 1.5 h, 65percent of the DMM has been converted. 0.008 mol of TBAB as a 50percent strength by weight aqueous solution is added in the course of 30 min. The evolution of carbon dioxide increases again. After a further hour, i.e. after 3 h from the beginning of the reaction, a DMM conversion of about 98percent is reached. The reaction is then complete; the reaction of the remaining DMM takes place in the subsequent working-up stage. Excess EDC is distilled off from the reaction mixture, initially at a temperature of from 110 to 120° C., the DMM conversion increasing to >99percent. Volatile fractions of high boilers and salt are then separated off using a rotary evaporator (160° C., 1 mbar). The distillate, predominantly DMF and the desired product dimethyl cyclopropane-1,1-dicarboxylate, is subjected to fractional distillation. The desired product is obtained in a purity of 99.3percent (GC analysis) and with a yield of about 83percent of theory, based on DMM used. The exit gas escaping from the reaction (predominantly CO2 and a small amount of H2O, vinyl chloride and EDC) is fed to an incineration unit for chlorinated hydrocarbons. The valuable substances EDC and DMF obtained in the working up of the reaction batch by distillation can be used for a further batch.
  • 27
  • [ 6914-71-2 ]
  • Z-(EtCH=CH)2CuLi [ No CAS ]
  • [ 76710-96-8 ]
  • 28
  • [ 6914-71-2 ]
  • [ 39590-81-3 ]
YieldReaction ConditionsOperation in experiment
86% With lithium aluminium tetrahydride; In diethyl ether; at 0 - 20℃; for 4h; Example XXIII; Scheme 28; 28-B (1-HYDROXYMETHYL-CYCLOPROPYL)-METHANOL; To a solution OF DIMETHYL 1, 1-CYCLOPROPANEDICARBOXYLATE 28-A (791 mg, 5.01 MMOL) in Et2O (20 mL) at 0°C was added lithium aluminum hydride (569 mg, 15.0 MMOL) portionwise. The reaction mixture was stirred at room temperature for 4 h and quenched with saturated NA2SO4 at 0°C. The precipitated solid was filtered and washed with THF. The filtrate was concentrated and purified by column chromatography (EtOAc) to give 440 mg (86percent) OF 28-B ; 1H NMR (300 MHz, CD13) 8 4.02 (s, 2 H), 3.56 (s, 4 H), 0.48 (s, 4 H); MS (ES) m/z: 125 (M+Na+).
48% The title compound was prepared by dissolving dimethyl cyclopropane-1, 1- dicarboxylate (lOg, 1 eq. ) in 250 mL THF and cooling the mixture to 0°C. To the cooled and stirred mixture 126.5 (2 eq. ) of lithium aluminum hydride (LAH) as a 1 M solution in THF was added. The mixture was heated at reflux for 16 hours. The mixture was cooled to 0°C and quench with a small portion of H20 followed by a small amount of 15percent sodium hydroxide along with additional water and stirred three hours. Filter through glass sintered funnel, rinsing with THF. The solution was concentrated to a clear oil. The title compound was recovered in a 48percent yield (3.095 g).
35% With lithium aluminium tetrahydride; In tetrahydrofuran; at -18 - 20℃; for 16h; LAH (0.28 g, 7.52 mmol) was dissolved in 10 mL of THF, and the solution was cooled to -18. Diethyl 1,1-cyclopropanedicarboxylate (1.0 g, 5.37 mmol) in 7 mL of THF was slowly added thereto, and the reaction mixture was stirred for 16 hours at room temperature. 0.3 mL of water and the 0.3 mL of 4M NaOH aqueous solution were added thereto. The mixture was filtered with Celite and purified by column chromatography to obtain the title compound (0.2 g, 35 percent). 1H NMR (CDCl) delta 3.62 (4H, s), 2.35 (2H, brs), 0.53 (4H, s)
  • 29
  • [ 98-03-3 ]
  • [ 6914-71-2 ]
  • [ 100-65-2 ]
  • [ 848587-08-6 ]
  • 30
  • [ 6914-71-2 ]
  • [ 3376-23-6 ]
  • (+)-2-methyl-3-phenyl-[1,2]oxazinane-4,4-dicarboxylic acid dimethyl ester [ No CAS ]
  • (-)-2-methyl-3-phenyl-[1,2]oxazinane-4,4-dicarboxylic acid dimethyl ester [ No CAS ]
  • 31
  • [ 98-01-1 ]
  • [ 6914-71-2 ]
  • [ 62-53-3 ]
  • 2-furan-2-yl-1-phenyl-pyrrolidine-3,3-dicarboxylic acid dimethyl ester [ No CAS ]
  • 32
  • [ 98-03-3 ]
  • [ 6914-71-2 ]
  • [ 62-53-3 ]
  • 1-phenyl-2-thiophen-2-yl-pyrrolidine-3,3-dicarboxylic acid dimethyl ester [ No CAS ]
  • 33
  • [ 6914-71-2 ]
  • C16H14N2O [ No CAS ]
  • 3-(1<i>H</i>-indol-3-yl)-2-<i>p</i>-tolyl-[1,2]oxazinane-4,4-dicarboxylic acid dimethyl ester [ No CAS ]
  • 34
  • [ 6914-71-2 ]
  • [ 62-53-3 ]
  • [ 100-46-9 ]
  • 1,2-diphenyl-pyrrolidine-3,3-dicarboxylic acid dimethyl ester [ No CAS ]
  • 35
  • [ 496-15-1 ]
  • [ 6914-71-2 ]
  • dimethyl 2-(2-(indolin-1-yl)ethyl)malonate [ No CAS ]
  • 36
  • [ 6914-71-2 ]
  • [ 6914-80-3 ]
YieldReaction ConditionsOperation in experiment
99% With ammonia; In methanol; at 20℃; for 90h; A solution of dimethyl cyclopropane-1 ,1 -dicarboxylate (57.8 g, 0.365 mol) in 7M ammonia in methanol was stirred at room temperature for 90 h, then evaporated under reduced pressure to afford the title compound as a colourless solid (52.2g, 99percent). H NMR (400 MHz; DMSO-d6): 7.82 (1 H, s), 7.35 (1 H, s), 3.63 (3H, s), 1 .34 (4H, s).
With ammonia; In methanol; Example (1) Preparation of Methyl 1-aminocarbonylcyclopropanecarboxylate Ammonia (20 l/h) is passed at 20° C. into a solution of 1,106 g (7 mol) of dimethyl cyclopropanedicarboxylate in 700 ml of methanol, with stirring. After approximately 10 hours, addition of NH3 is stopped, and the reaction mixture is cooled to 8° C. The solid formed is filtered off with suction, then washed using 200 g of cold methanol. After drying the product, 926.2 g (92.5percent) of methyl 1-aminocarbonylcyclopropanecarboxylate are obtained (m.p.: 157° C.).
With ammonia; In methanol;Inert atmosphere; Preparational Example 13 Preparation of 1-aminocyclopropyl acetic acid hydrochloride [0455] [0456] After reducing pressure in the reaction vessel, the vessel was filled with nitrogen gas, to which 6.8 ml of 7 N NH3 in MeOH was loaded. 1.0 g (6.30 mmol) of dimethylcyclopropane-1,1-dicarboxylate was dissolved in 63 ml of MeOH, which was also loaded into the reaction vessel. If the starting material still remained, NH3 gas could be provided for bubbling for 15 minutes. Upon completion of the reaction, the reaction solvent was eliminated by evaporation under reduced pressure and the precipitated solid compound was filtered and washed with 0° C. methanol, followed by vacuum drying. The obtained reaction product was dissolved in 5 ml of 7.4percent NaOH/H2O, followed by stirring at 40° C. for 20 minutes. Then, the temperature was lowered to room temperature (Reactant A). 7 ml of 12.3percent NaOCl and 2 ml of 30percent NaOH/H2O were stirred together at room temperature for 1 hour (Reactant B). These reactants A and B were mixed and stirred at 80° C. for 4 minutes. After lowering the temperature thereof, 4 ml of hydrochloric acid was slowly added thereto carefully not to increase the temperature more than 60° C. The solvent was eliminated by evaporation under reduced pressure and the reactant was dissolved in ethanol. The precipitated solid compound was filtered. The remaining solution was evaporated under reduced pressure and then dissolved in hot acetone. The generated solid compound was filtered and dried to give 0.5 g of 1-aminocyclopropyl acetic acid hydrochloride (yield: 58percent). [0457] 1H NMR (400 MHz, D2O) delta 1.40-1.43 (m, 2H), 1.22-1.25 (m, 2H)
  • 37
  • [ 6914-71-2 ]
  • [ 910052-66-3 ]
  • 38
  • [ 6914-71-2 ]
  • [ 910052-67-4 ]
  • 39
  • [ 6914-71-2 ]
  • (E)-3-(1-Carbamoyl-cyclopropyl)-acrylic acid methyl ester [ No CAS ]
  • 40
  • [ 6914-71-2 ]
  • dimethyl 2,3-dihydro-1H-pyrrolo[1,2-a]indole-1,1-dicarboxylate [ No CAS ]
  • 41
  • [ 6914-71-2 ]
  • [ 762269-31-8 ]
  • 42
  • [ 6914-71-2 ]
  • 8,8-dimethyl-2-phenyl-1-thiophen-2-yl-7,9-dioxa-2-aza-spiro[4.5]decane [ No CAS ]
  • 43
  • [ 6914-71-2 ]
  • [ 762269-35-2 ]
  • 44
  • [ 6914-71-2 ]
  • [ 113020-21-6 ]
YieldReaction ConditionsOperation in experiment
71% Synthesis of Cyclopropane-1,1-dicarboxylic acid methyl ester KOH (42 mg, 0.75 mmol) was added to a solution cyclopropane-1,1-dicarboxylic acid dimethyl ester (100 mg, 0.63 mmol) in methanol. The resulting mixture was stirred for 4 hours at ambient temperature then concentrated. The residue was diluted with water, acidified with conc. HCl and the product was extracted with dichloromethane. The organic layer was dried over sodium sulfate and concentrated under reduced pressure to afford 65 mg (71%) of cyclopropane-1,1-dicarboxylic acid methyl ester.
60% Preparation 201 -Methoxycarbon lcyclopropanecarboxylic acidDimethyl cyclopropane- 1, 1-dicarboxylate (26.08 mL, 189.87 mmol) is dissolved in methanol (319 mL) and the solution is cooled to 0 C. I NaOH (190 mL, 190 mmol, 1 eq) in water is added dropwise. The resulting mixture is stirred at RT overnight. The solution is concentrated under reduced pressure to remove the methanol and the resulting aqueous solution is washed with dichloromethane (3 x 50 mL) and acidified with 1 N HC1 (pH = 2-3). The solution is then extracted with ethyl acetate (5 x 100 mL) and dichloromethane (3 x 50 mL). The combined organic portions are dried over MgS04, filtered, and concentrated to afford the title compound (16.4 g, 60%). ¾ NMR(400 MHz, CDC13); delta 1.9-1.7 (m, 4H), 3.78 (s, 3H).
1,1-Cyclopropanedicarboxylic acid dimethyl ester (25 g) was dissolved in methanol (250 mL). The solution was cooled under ice cooling, and 1N aqueous sodium hydroxide (158 mL) was added dropwise thereto. The thus-obtained mixture was brought back to room temperature, and was stirred overnight. Methanol was distilled away, and the residue was washed with chloroform. The aqueous layer was cooled under ice cooling, and concentrated aqueous HCl was added thereto, to thereby adjust to pH 2. The resultant mixture was extracted with ethyl acetate, and the extract was dried over sodium sulfate anhydrate. The solvent was distilled away under reduced pressure, to thereby give the title compound (16.8 g).1H-NMR(CDCl3) delta:1.76-1.80(2H, m), 1.82-1.88(2H, m), 3.79(3H, s), 12.73(1H, br).
With sodium hydroxide; In methanol; REFERENTIAL EXAMPLE 161 1-(Methoxycarbonyl)cyclopropanecarboxylic acid: Dimethyl 1,1-cyclopropanecarboxylate (25 g) was dissloved in methanol (250 ml), and the solution was cooled with ice. A 1N aqueous solution of sodium hydroxide (158 ml) was then added dropwise, and the resultant mixture was warmed to room temperature and stirred overnight. After methanol was distilled off, the residue was washed with chloroform, and a water layer was cooled with ice, adjusted to pH 2 with concentrated hydrochloric acid and extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to obtain the title compound (16.8 g). 1H-NMR (CDCl3) delta: 1.76-1.80(2H,m), 1.82-1.88(2H,m), 3.79(3H,s), 12.73(1H,br).
Method C; <strong>[6914-71-2]Dimethyl 1,1-cyclopropanedicarboxylate</strong> (5 ml) was mixed with NaOH (1.4 g) in MeOH (40 ml)/water (4 ml). The reaction mixture was stirred at RT overnight and the solvent was evaporated. To the residue was added ether (50 ml), water (50 ml) and extracted once. The aqueous layer was acidified with 6N HCl and extracted three times with ether, the combined organic layer was washed with brine, dried and evaporated to give 1-(methoxycarbonyl)cyclopropanecarboxylic acid (4 g).
With sodium hydroxide; In methanol; water; at 0 - 20℃; [Referential Example 161] 1-(Methoxycarbonyl)cyclopropanecarboxylic acid: dimethyl 1,1-cyclopropanecarboxylate (25 g) was dissloved in methanol (250 ml), and the solution was cooled with ice.. A 1N aqueous solution of sodium hydroxide (158 ml) was then added dropwise, and the resultant mixture was warmed to room temperature and stirred overnight.. After methanol was distilled off, the residue was washed with chloroform, and a water layer was cooled with ice, adjusted to PH 2 with concentrated hydrochloric acid and extracted with ethyl acetate.. The extract was dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to obtain the title compound (16.8 g).1H-NMR (CDCl3) delta: 1.76-1.80(2H,m), 1.82-1.88(2H,m), 3.79(3H,s), 12.73(1H,br).
<strong>[6914-71-2]Dimethyl 1,1-cyclopropanedicarboxylate</strong> (5 ml) was mixed with NaOH (1.4 g) in MeOH (40 ml)/water (4 ml). The reaction mixture was stirred at RT overnight and the solvent was evaporated. To the residue was added ether (50 ml), water (50 ml) and extracted once. The aqueous layer was acidified with 6N HCl and extracted three times with ether, the combined organic layer was washed with brine, dried and evaporated to give 1-(methoxycarbonyl)cyclopropanecarboxylic acid (4 g).
1.58 g With water; sodium hydroxide; In methanol; at 20℃; for 23h; (1) To a solution of dimethyl 1,1-cyclohexanedicarboxylate (2.08 g) in methanol (15 mL) was added a 1Naqueous sodium hydroxide solution (13.2 mL), and the mixture was stirred at room temperature for 23 hours. Themethanol was distilled off under reduced pressure, and the residue was washed with n-hexane. To an aqueous layerwas added 1N hydrochloric acid (10 mL), and the mixture was extracted with chloroform. The extract was washed withsaturated brine, and dried over anhydrous magnesium sulfate. After drying, concentration under reduced pressureprovided Compound 2 (1.58 g) as a colorless oil.
With water; lithium hydroxide; In methanol; at 20℃; for 1h; Dimethyl cyclopropane dicarboxylate (10.12 g, 63.99 mmol) was dissolved in 100 mL (1:1 V:V) CH3OH/H2O and stirred at room temperature. Lithium hydroxide (2.68 g, 63.99 mmol) dissolved in 20 ml H2O was slowly added to the above solution for three times at room temperature, and then the mixture was allowed to react for 1 h with stirring. After the reaction was completed, the resultant was adjusted to pH3 with dilute hydrochloric acid, extracted with DCM, and dried over anhydrous sodium sulfate. The product without purification was to be used in the next step.
With water; lithium hydroxide; In methanol; at 20℃; for 1h; A solution of dimethyl cyclopropane-1,1-dicarboxylate (10.12 g,63.99 mmol) in MeOH/H2O (100 mL, 1:1 V:V), stirring in room temperature,was treated dropwise with a solution of lithium hydroxide(2.68 g, 63.99 mmol) in 20 mL H2O. Stir for one hour after dropwise.Then adjust pH to 3 with dilute hydrochloric acid, extract with dichloromethane(50 mL) for three times, without purification go on nextstep.

  • 45
  • [ 6914-71-2 ]
  • [ 29328-23-2 ]
YieldReaction ConditionsOperation in experiment
With lithium aluminium tetrahydride; In tetrahydrofuran; at 0℃; for 2h; Reference Example 45 Production of [1-([tert-butyl(dimethyl)silyl]oxy}methyl)cyclopropyl]methanol To a solution of lithium aluminum hydride (9.34 g, 246 mmol) in THF (150 ml) was dropwise added a solution of dimethylcyclopropane-1,1-dicarboxylate (25.95 g, 164.1 mmol) in THF (150 ml) under ice cooling. The solution was stirred at 0 °C for 2 hours, and to the solution were slowly added water (9.5 ml), 15 percent aqueous solution of NaOH (9.5 ml) and water (30 ml), successively. Insoluble matters were filtered off, and the filtrate was concentrated to give cyclopropane-1,1-dimethylmethanol as colorless oily substance.
YieldReaction ConditionsOperation in experiment
With lithium hydroxide; In n-heptane; at 100℃; for 3h;Reactivity (does not react); Comparative Example 1; According to the same manner as that described in Example 3, the reaction did not proceed and (S)-tert-leucinol and dimethyl cyclopropanedicarboxylate, which are starting materials, were recovered except that lithium methoxide was not used in Example 3.
  • 47
  • [ 6914-71-2 ]
  • [ 112245-13-3 ]
  • [ 874916-76-4 ]
YieldReaction ConditionsOperation in experiment
93 - 95% With lithium methanolate; In n-heptane; at 100℃; for 3h;Product distribution / selectivity; Example 2; According to the same manner as that described in Example 1, 1.28 g of a white powder of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide was obtained except that 980 mg (8.36 mmol) of (S)-tert-leucinol, 655 mg (4.14 mmol) of <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong> and 7.9 mg (0.21 mmol) of lithium methoxide were used as each reaction agent. Yield: 94percent (based on <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>). 1H-NMR (delta: ppm, CD3S(O)CD3 solvent, TMS standard) 7.76 (d, J=9.56 Hz, 2H), 4.58 (t, J=5.20 Hz, 2H.), 3.72 (dt, J=9.34 Hz, J=3.50 Hz, 2H), 3.63-3.57 (m, 2H), 3.41-3.34 (m, 2H), 1.29-1.23 (m, 2H), 1.10-1.05 (m, 2H), 0.82 (s, 18H); Example 7-2 <Synthesis of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide>; According to the same manner as that described in Example 2, 1.28 g of a white powder of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide was obtained except that 980 mg (8.36 mmol) of (S)-tert-leucinol obtained in Example 7-1 was used. Yield: 93percent (based on <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>).; Example 8-2 <Synthesis of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide>; According to the same manner as that described in Example 2, 3.39 g of a white powder of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide was obtained except that 2.55 g (21.8 mmol) of (S)-tert-leucinol obtained in Example 8-1, 1.72 g (10.9 mmol) of <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong> and 20.7 mg (0.54 mmol) of lithium methoxide were used. Yield: 95percent (based on <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>).
90% With lithium hydroxide; In n-heptane; at 100℃; for 3h;Product distribution / selectivity; Example 3; According to the same manner as that described in Example 2, 640 mg of a white powder of N,N'-bis[(S)-1-tert-butyl-2-hydroxyethyl]cyclopropane-1,1-dicarboxamide was obtained except that 507 mg (4.32 mmol) of (S)-tert-leucinol, 342 mg (2.16 mmol) of <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong> and 4.5 mg (0.11 mmol) of lithium hydroxide monohydrate were used as each reaction agent. Yield: 90percent (based on <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>).
  • 48
  • [ 122250-09-3 ]
  • [ 6914-71-2 ]
  • N,N'-bis[(R)-1-phenyl-1-(1-hydroxycyclohexyl)methyl]cyclopropane-1,1-dicarboxamide [ No CAS ]
YieldReaction ConditionsOperation in experiment
90% With lithium methanolate; In n-heptane; at 100℃; for 3h; Example 1; In a 100 mL Schlenk tube purged with nitrogen, 980 mg (7.14 mmol) of (R)-phenylglycinol, 565 mg (3.57 mmol) of <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>, 6.8 mg (0.18 mmol) of lithium methoxide and 40 mL of normal heptane were mixed and the resulting mixture was stirred at 100°C for 3 hours. The homogeneous solution changed to a white suspension as the reaction progresses. After that, reaction solution was cooled to room temperature and filtered. The obtained powder was dried to obtain 1.19 g of a white powder of N,N'-bis[(R)-1-phenyl-1-(1-hydroxycyclohexyl)methyl]cyclopropane-1,1-dicarboxamide. Yield: 90percent (based on <strong>[6914-71-2]dimethyl 1,1-cyclopropanedicarboxylate</strong>). 1H-NMR (delta: ppm, CD3S(O)CD3 solvent, TMS standard) 8.64 (d, J=8.60Hz, 2H), 7.32-7.19 (m, 10H), 5.01 (s, 2H), 4.90 (q, 6.73Hz, 2H), 3.59 (d, 5.2Hz, 4H), 1.30 (s, 4H)
  • 49
  • [ 107-21-1 ]
  • [ 107-06-2 ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
YieldReaction ConditionsOperation in experiment
With tetrabutylammomium bromide; potassium carbonate; EXAMPLE 4 Dimethyl 1,1-cyclopropanedicarboxylate 319.6 g of 1,2-dichloroethane (3.23 mol), 5 g of polyethylene glycol (mean molar mass 600 g/mol) and 168.0 g of potassium carbonate (1.2 mol) were initially introduced, and the reaction mixture was heated until the 1,2-dichloroethane refluxes. 132.1 g of dimethyl malonate (1 mol) and 1.25 g of tetrabutylammonium bromide (3.88 mmol) were then added at the boil. The mixture was stirred using a paddle stirrer for 6 hours. Water formed during the reaction was removed by azeotropic distillation with 1,2-dichloroethane throughout the reaction.
  • 50
  • anhydrous ethylene glycol dimethyl ether [ No CAS ]
  • [ 107-06-2 ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
YieldReaction ConditionsOperation in experiment
With tetrabutylammomium bromide; potassium carbonate; EXAMPLE 1 Dimethyl 1,1-cyclopropanedicarboxylate 450.3 g of 1,2-dichloroethane (4.55 mol), 15.5 g of polyethylene glycol dimethyl ether (mean molar mass 250 g/mol) and 168.0 g of potassium carbonate (1.2 mol) were initially introduced, and the reaction mixture was heated until the 1,2-dichloroethane refluxes. 118.9 g of dimethyl malonate (0.9 mol) and 1.25 g of tetrabutylammonium bromide (3.88 mmol) were then added at the boil. The mixture was stirred using a finely dispersing stirrer (Ultra Turrax) for 6 hours. Water formed during the reaction was removed by azeotropic distillation with 1,2-dichloroethane throughout the reaction.
With tetrabutylammomium bromide; potassium carbonate; EXAMPLE 2 Dimethyl 1,1-cyclopropanedicarboxylate 296.9 g of 1,2-dichloroethane (3 mol), 15 g of polyethylene glycol dimethyl ether (mean molar mass 500 g/mol) and 177.1 g of potassium carbonate (1.265 mol) were initially introduced, and the reaction mixture was heated until the 1,2-dichloroethane refluxes. 125.5 g of dimethyl malonate (0.95 mol) and 1.25 g of tetrabutylammonium bromide (3.88 mmol) were then added at the boil. The mixture was stirred using a paddle stirrer for 6 hours. Water formed during the reaction was removed by azeotropic distillation with 1,2-dichloroethane throughout the reaction.
  • 51
  • polyethylene glycol monomethyl ether [ No CAS ]
  • [ 107-06-2 ]
  • [ 108-59-8 ]
  • [ 6914-71-2 ]
YieldReaction ConditionsOperation in experiment
With tetrabutylammomium bromide; potassium carbonate; EXAMPLE 3 Dimethyl 1,1-cyclopropanedicarboxylate 296.9 g of 1,2-dichloroethane (3 mol), 5 g of polyethylene glycol monomethyl ether (mean molar mass 550 g/mol) and 177.1 g of potassium carbonate (1.265 mol) were initially introduced, and the reaction mixture was heated until the 1,2-dichloroethane refluxes. 125.5 g of dimethyl malonate (0.95 mol) and 1.25 g of tetrabutylammonium bromide (3.88 mmol) were then added at the boil. The mixture was stirred using a paddle stirrer for 6.5 hours. Water formed during the reaction was removed by azeotropic distillation with 1,2-dichloroethane throughout the reaction.
  • 52
  • [ 6914-71-2 ]
  • [ 22059-21-8 ]
  • [ 6914-74-5 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sodium hydroxide; ammonia; In methanol; Example (2) Preparation of 1-aminocarbonylcyclopropanecarboxylic Acid Ammonia (20 l/h) is passed at 20° C. into a solution of 1,106 g (7 mol) of dimethyl cyclopropane-1,1-dicarboxylate in 700 ml of methanol, with stirring. After approximately 10 hours, addition of NH3 is stopped. 1.4 l of 20percent sodium hydroxide solution are added to the suspension, and the mixture is heated to 40° C. The methanol is distilled off in vacuo. When the mixture is cold, 680 g of concentrated hydrochloric acid are added, whereupon the product precipitates. It is filtered off with suction, washed with cold water and dried (m.p.: 182° C.). Yield: 813 g, 90percent. If it is intended to degrade the 1-aminocarbonylcyclopropanecarboxylic acid to give ACC, then neutralizing with hydrochloric acid is not necessary.
  • 53
  • [ 110-71-4 ]
  • [ 6914-71-2 ]
  • [ 1378673-60-9 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride;aluminium trichloride; EXAMPLE 1 Preparation of Dimethyl 2-Chloroethyl Malonate 200 g of 1,2-dimethoxy ethane are placed into a 1 liter multi-neck flask equipped with a stirrer, thermometer, cooler and gas inlet tube, and 55 g of hydrogen chloride (1.5 mols) are introduced into the flask. 158.1 g of dimethyl cyclopropane-1,1-dicarboxylate (1.0 mol) and 0.4 g of aluminum chloride were then dissolved in the contents of the flask, and the solution was stirred for 5 hours at 50° C. The clear solution was then worked up by distillation in a column. After distilling off the 1,2-dimethoxy ethane and the excess hydrogen chloride, both of which can be used again in subsequent batches, the target product was distilled off at 85° C./5 mbar. Yield: 183.2 g (93.3percent of theory) Purity: 99.1percent (GC) Flash point: 120°+-2° C.
  • 54
  • [ 6914-71-2 ]
  • [ 942617-71-2 ]
YieldReaction ConditionsOperation in experiment
An oven-dried 1 L three-neck flask equipped with magnetic stir bar, nitrogen gas inlet valve, and digital thermometer probe, and addition funnel had been charged with 1-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-2-phenyl-ethanone oxime (Compound B, 26.6 g) and anhydrous THF (140 mL.) The reaction vessel is submerged in an ice-methanol bath equipped with a thermometer reading -18° C. The internal solution temperature is cooled to -9.0° C. A solution consisting of 2.5 M n-butyllithium in hexane (31 mL, 78 mmol) is added dropwise over 25 minutes (bath temperature -18 to -16° C., internal mixture temperature -9.0 to -0.6° C.), over which time the solution color turned from yellow after addition of the first few drops to orange at the first endpoint. The reaction mixture is stirred for three minutes as the internal mixture temperature cooled to -3.3° C. (bath temperature -14° C.) Another 31 mL of 2.5 M n-butyllithium in hexane is added over 11 minutes (bath temperature -14 to -16° C., internal mixture temperature -3.3 to -0.3° C. with a peak temperature in that time period of +0.2° C.) The reaction mixture is stirred for 31 minutes as the internal mixture temperature cooled to -10.1° C. (bath temperature -14° C.) Cyclopropane-1,1-dicarboxylic acid dimethyl ester (26.0 mL) is added over less than one minute to give an internal mixture temperature of +4.6° C. (bath temperature -13° C.) The reaction mixture is stirred for one hour and is quenched with the addition of brine solution (100 mL.) The layers are separated and the organic phase is dried over anhydrous magnesium sulfate and is concentrated under reduced pressure to afford an oil (59.9 g.) The product is purified by flash silica gel column chromatography to afford the foam product (24.0 g.)
An oven-dried 1 L three-neck flask equipped with magnetic stir bar, nitrogen gas inlet valve, and digital thermometer probe, and addition funnel is charged with 1-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-2-phenyl-ethanone oxime, which may be produced as in Example 136 (26.59 g) and anhydrous tetrahydrofuran (140 mL.) The reaction vessel is submerged in an ice-methanol bath equipped with a thermometer reading -18° C. The internal solution temperature is cooled to -9.0° C. A solution comprised of 2.5 M n-butyllithium in hexane (31 mL) is added dropwise over 25 minutes (bath temperature -18 to -16° C., internal mixture temperature -9.0 to -0.6° C.), over which time the solution color turns from yellow after addition of the first few drops to orange at the first endpoint. The reaction mixture is stirred for three minutes as the internal mixture temperature cooled to -3.3° C. (bath temperature -14° C.) Another 31 mL of 2.5 M n-butyllithium in hexane is added over 11 minutes (bath temperature -14 to -16° C., internal mixture temperature -3.3 to -0.3° C. with a peak temperature in that time period of +0.2° C.) The reaction mixture is stirred for 31 minutes as the internal mixture temperature cooled to -10.1° C. (bath temperature -14° C.) Dimethyl cyclopropanedicarboxylate (26.0 mL) is added over less than one minute to give an internal mixture temperature of +4.6° C. (bath temperature -13° C.) The reaction mixture is stirred for one hour and is quenched with the addition of brine solution (100 mL.) The layers are separated and the organic phase is dried over anhydrous magnesium sulfate and is concentrated under reduced pressure to afford a clear yellow-orange liquid (59.9 g crude) This material is combined with another batch of crude product prepared using the same method (100 g crude) and is purified by filtration through a 1 Kg silica plug (gradual enrichment of ethyl acetate in hexanes) giving a viscous residue (60 g.) This material is divided into two portions and each portion is subsequently purified by flash silica gel chromatography. Elution with a gradient (100percent hexanes to 100percent ethyl acetate over 4200 mL, or seven column volumes) affords the title compound as a foam (42 g.) Alternatively, the reaction mixture may be quenched with acetic acid instead of brine solution.
THF is added to 1-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-2-phenyl-ethanone oxime (5.0 g) with stirring until it completely dissolves. The solution is degassed with nitrogen and cooled to -15° C. N-butyllithium is added while keeping the temperature below 0° C. Reaction mixture turns from light yellow to orange upon addition of the second equivalent of n-butyllithium. After addition is complete, the mixture is stirred for 15 minutes between -15 to -10° C. Dimethyl 1,1-cyclopropane dicarboxylate is added keeping the temperature below 0° C. Upon addition, the reaction mixture turned yellow. Allow reaction to stir over 20 minutes. The reaction is brought up to 0° C. and quenched with brine (25 mL.) To the resulting cloudy solution is added ethyl acetate (25 mL) then 1 M HCl until a clear solution is obtained. The layers are separated and the organics washed with additional brine. The organic layer is dried (anhydrous magnesium sulfate), filtered and concentrated under reduced pressure. Purify resulting yellow residue by flash chromatography (0percent to 50percent ethyl acetate-hexanes). Isolate 5.7 g of the title compound as a white foamy solid; TLC Rf=0.08 (4:1 hexanes-ethyl acetate); MS (APCI+ 10V)=450 (MH+-18.)
 

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