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Chemical Structure| 101349-12-6

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Product Details of [ 101349-12-6 ]

CAS No. :101349-12-6
Formula : C10H10FNO
M.W : 179.19
SMILES Code : FC1=CC2=C(NC=C2CCO)C=C1
MDL No. :MFCD09752697
InChI Key :MXTYSYXDDDVPBQ-UHFFFAOYSA-N
Pubchem ID :13616248

Safety of [ 101349-12-6 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H317
Precautionary Statements:P280

Computational Chemistry of [ 101349-12-6 ] Show Less

Physicochemical Properties

Num. heavy atoms 13
Num. arom. heavy atoms 9
Fraction Csp3 0.2
Num. rotatable bonds 2
Num. H-bond acceptors 2.0
Num. H-bond donors 2.0
Molar Refractivity 49.19
TPSA ?

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

36.02 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

1.69
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

2.2
Log Po/w (WLOGP)?

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

2.26
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.

1.68
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

3.09
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

2.18

Water Solubility

Log S (ESOL):?

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

-2.72
Solubility 0.344 mg/ml ; 0.00192 mol/l
Class?

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

Soluble
Log S (Ali)?

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

-2.59
Solubility 0.46 mg/ml ; 0.00257 mol/l
Class?

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

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

-3.79
Solubility 0.0287 mg/ml ; 0.00016 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

Yes
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

Yes
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.

-5.83 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

0.0 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)

1.65

Application In Synthesis of [ 101349-12-6 ]

* 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 [ 101349-12-6 ]

[ 101349-12-6 ] Synthesis Path-Downstream   1~35

  • 1
  • [ 4949-44-4 ]
  • [ 101349-12-6 ]
  • [ 57816-80-5 ]
  • 3
  • [ 582320-41-0 ]
  • [ 101349-12-6 ]
  • 4
  • [ 443-73-2 ]
  • [ 101349-12-6 ]
YieldReaction ConditionsOperation in experiment
100% To a solution of 5-fluoroindole -3-acetic acid (ig, 5.2mmol) in THE (2Oml) was added a1M solution of lithium aluminium hydride in THE (10.4m1, 10.4mmol) and the mixturerefluxed for 1.5 hours. The mixture was cooled, 0.39m1 of water and then 0.39m1 of15% NaOH(aq) added, followed by I .2m1 of water. The precipitate was collected viavacuum filtration and the filtrate concentrated to give 2-(5-fluoro-1 H-indol-3-yl)ethanol,an orange oil (0.927g, 100%); ?H NMR (400 MHz, CHLOROEORM-d) 6 ppm 2.98 (t,J=6.41 Hz, 2 H)1 3.89 (t, J=6.18 Hz, 2 H), 6.95 (td, J9.04, 2.52 Hz, I H), 7.12 (s, 1 H), 7.22 - 7.30 (m, 2 H), 8.06 (br. S., 1 H).
  • 5
  • [ 101349-12-6 ]
  • [ 127561-10-8 ]
YieldReaction ConditionsOperation in experiment
70% With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 0 - 20℃; for 5h; To a solution of <strong>[101349-12-6]2-(5-fluoro-1H-indol-3-yl)ethanol</strong> (18a) (10g,55.8 mmol) in CH2Cl2 (200 mL) was added successively CBr4 (27.76 g, 83.71 mmol) and PPh3 (21.52 g, 82.03 mmol) at 0 C. Themixture was stirred at room temperature for 5 h. After thecompletion of reaction, the solvent was concentrated underreduced pressure. The residue was purified by column chromatographyon silica gel (PE/EA = 5:1, V/V) to give compound 19a as ayellow oil (9.46 g, 70%) [27]. MS (ESI) m/z: 242.06 [M+H]+.
70% With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 0 - 20℃; for 5h; To a solution of <strong>[101349-12-6]2-(5-fluoro-1H-indol-3-yl)ethanol</strong> (3a) (10 g, 55.8 mmol) in CH2Cl2 (200 mL) was added successively CBr4 (27.76 g, 83.71 mmol) and PPh3 (21.52 g, 82.03 mmol) at 0 oC. The mixture was stirred at room temperature for 5h. After the completion of reaction, the solvent was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (PE/EA= 5:1, V/V) to give compound 4a as a yellow oil (9.46 g, 70%) . MS (ESI) m/z: 242.06 [M+H]+.
  • 7
  • [ 497258-29-4 ]
  • [ 101349-12-6 ]
  • 8
  • [ 101349-12-6 ]
  • 2-(3"-(5"-fluoro-indolyl)ethyloxy)adenosine [ No CAS ]
  • 10
  • [ 101349-12-6 ]
  • [ 936252-76-5 ]
  • 11
  • [ 101349-12-6 ]
  • [ 936252-92-5 ]
  • 13
  • [ 101349-12-6 ]
  • [ 913941-84-1 ]
  • 15
  • [ 101349-12-6 ]
  • 2-O-(5-aminopentyl)-1-O-[2-(5-fluoroindol-3-yl)ethyl]catechol [ No CAS ]
  • 16
  • [ 101349-12-6 ]
  • 2-O-(5-aminopentyl)-1-O-[2-(5-fluoroindol-3-yl)ethyl]-4,5-dichlorocatechol [ No CAS ]
  • 17
  • [ 101349-12-6 ]
  • [ 913941-86-3 ]
  • 18
  • [ 101349-12-6 ]
  • 3-{2-[2-(5-azido-pentyloxy)-phenoxy]-ethyl}-5-fluoro-indole-1-carboxylic acid <i>tert</i>-butyl ester [ No CAS ]
  • 19
  • [ 101349-12-6 ]
  • 3-{2-[2-(5-azido-pentyloxy)-4,5-dichloro-phenoxy]-ethyl}-5-fluoro-indole-1-carboxylic acid <i>tert</i>-butyl ester [ No CAS ]
  • 20
  • [ 101349-12-6 ]
  • [ 913941-87-4 ]
  • 21
  • [ 101349-12-6 ]
  • [2-(5-Fluoro-2,3-dihydro-benzofuran-7-yloxy)-ethyl]-[2-(5-fluoro-1H-indol-3-yl)-ethyl]-amine [ No CAS ]
  • 22
  • [ 101349-12-6 ]
  • [2-(6-Fluorochroman-8-yloxy)-ethyl]-[2-(5-fluoro-1H-indol-3-yl)-ethyl]-amine [ No CAS ]
  • 23
  • [ 92671-36-8 ]
  • [ 101349-12-6 ]
  • 24
  • [ 350-46-9 ]
  • [ 101349-12-6 ]
  • 25
  • [ 860159-94-0 ]
  • [ 75-75-2 ]
  • [ 101349-12-6 ]
  • 6-fluoro-1,1-[3-dimethylamino-3-(3-thienyl)pentamethylen]-1,3,4,9-tetra-hydro-pyrano[3,4-b]-indol dimethansulfonat [ No CAS ]
  • 26
  • [ 65619-64-9 ]
  • [ 101349-12-6 ]
  • 1,1-[3-dimethylamino-3-(2-thienyl)pentamethylen]-1,3,4,9-tetrahydro-pyrano[3,4-b]-6-fluoro-indol [ No CAS ]
  • 27
  • [ 860159-99-5 ]
  • [ 101349-12-6 ]
  • 1,1-[3-methylamino-3-(2-thienyl)pentamethylen]-1,3,4,9-tetrahydro-pyrano[3,4-b]-6-fluoro-indol [ No CAS ]
  • 28
  • [ 65619-20-7 ]
  • [ 101349-12-6 ]
  • (1r,4r)-6'-fluoro-N,N-dimethyl-4-phenyl-4',9'-dihydro-3'H-spiro[cyclohexane-1,1'-pyrano[3,4,b]indol]-4-amine [ No CAS ]
YieldReaction ConditionsOperation in experiment
3.5 g With trimethylsilyl trifluoromethanesulfonate; In dichloromethane; at 0 - 10℃; 4-(dimethylamino)-4-phenylcyclohexanone (3 g, 13.82 mmol), <strong>[101349-12-6]2-(5-fluoro-1H-indol-3-yl)ethanol</strong> (2.47 g, 13.82 mmol) and 150 mL dichloromethane were charged to a flask at 0 C. A solution of trifluoromethane sulfonic acid trimethylsilylester (3 mL, 15.5 mmol) in 3 mL dichloromethane were added quickly. The reaction mixture changed color to violet and the temperature rose to 10 C. The reaction mixture was cooled in an ice bath and stirred for 20 min. Meanwhile a solid precipitated. The ice bath was removed and the reaction mixture was stirred for 3 to 3.5 hours at room temperature. Subsequently 50 mL of NaOH (1N) were added and the reaction mixture was stirred further 10 min. The colour changed to yellow and a solid precipitated. In order to complete the precipitation the reaction mixture (two liquid phases) was stirred for further 20 min while cooled in an ice bath. Eventually the solid was filtered off. The resulting solid (4.2 g) was subsequently recrystallized in 800 mL 2-propanol. Yield: 3.5 g. To enhance the yield, the liquid (water and dichloromethane) filtrate was separated. The aqueous solution with extracted 3 times with 20 mL dichloromethane. The organic phases were united and dried with MgSO4 and subsequently the solvent was stripped off until dryness. The resulting solid (1.7 g) was subsequently recrystallized under reflux in 800 mL 2-Propanol.
  • 29
  • [ 127561-11-9 ]
  • [ 101349-12-6 ]
YieldReaction ConditionsOperation in experiment
100% With LiAlH4; In tetrahydrofuran; EXAMPLE 11 5-Floro-3-(2-hydroxyethyl)indole To a suspension of LiAlH4 (8.60 g, 0.23 mol) in 400 mL of dry THF was added 5-fluoro-3-indoleglyoxylic acid ethyl ester (13.50 g, 0.057 mol) portionwise at room temperature. Preparation of this ester intermediate is given hereinbelow. The mixture was heated to reflux under Ar for 1 h and was then cooled at 0 C. and quenched according to the method of Fieser (Fieser and Fieser, "Reagents for Organic Synthesis", Vol. 1, pg. 584). The resulting slurry was filtered and the filter cake was washed with THF. The filtrate was dried (Na2 SO4) and evaporated to give the product (10.00 g, 100%) as a yellow oil. It was used as such without further purification; IR (neat) 3420 cm-1
100% With LiAlH4; In tetrahydrofuran; Example 13 5-Fluoro-3-(2-hydroxyethyl)indole To a suspension of LiAlH4 (8.60 g, 0.23 mole) in 400 mL of dry THF was added 5-fluoro-3-indoleglyoxylic acid ethyl ester (13.50 g, 0.057 mole) portionwise at room temperature. Preparation of this ester intermediate is given hereinbelow. The mixture was heated to reflux under Ar for 1 h and was then cooled at 0 C. and quenched according to the method of Fieser (Fieser and Fieser, "Reagents for Organic Synthesis", Vol. 1, pg. 584). The resulting slurry was filtered and the filter cake was washed with THF. The filtrate was dried (Na2 SO4) and evaporated to give the product (10.00 g, 100%) as a yellow oil. It was used as such without further purification; IR (neat) 3420 cm-1. 1 Hnmr (80 MHz, CDCl3). delta: 7.73 (br s, 1H), 7.1-6.4 (m, 4H), 3.57 (t, J=8 Hz, 2H), 2.66 (t, J=8 Hz, 2H), 1.20 (br s, 1H).
  • 30
  • CBr4 [ No CAS ]
  • [ 101349-12-6 ]
  • [ 127561-10-8 ]
YieldReaction ConditionsOperation in experiment
61% With triphenylphosphine; In acetonitrile; Example 20 5-Fluoro-3-(2-bromoethyl)indole To a solution of 5-fluoro-3-(2-hydroxyethyl)indole (10.3 g, 0.056 mole) and CBr4 (24.8 g, 0.073 mole) in 100 mL of dry acetonitrile at 0 C. under Ar was added a solution of triphenylphosphine (19.6 g, 0.073 mole) in 200 mL of dry acetonitrile. The mixture was stirred at 0 C. for 1 h and then at room temperature for 2 h. The resulting mixture was evaporated and the residue was chromatographed (SiO2 /ethyl acetate-hexane=1:4) to give the product (8.50 g, 61%) as a brown solid; IR (neat) 3440 cm-1; 1 Hnmr (80 MHz, CDCl3) delta: 7.75 (br s, 1H), 7.15-6.57 (m, 4H), 3.53-3.32 (m, 2H), 3.17-2.94 (m, 2H).
YieldReaction ConditionsOperation in experiment
95% General procedure: 7-Fluoro-3-(3-hydroxypropyl)-1H-indole (2). A solution of 2-fluorophenylhydrazine hydrochloride (1.1 g, 6.9 mmol) in 4% aqueous H2SO4 (10 mL) and DMAc (10 mL) was heated at 100 C. To this solution was added dihydropyran (630 muL, 6.9 mmol) dropwise over 2 min. The reaction was heated at 100 C for 2 h, then the reaction mixture was cooled to room temperature, and extracted with EtOAc. The organic layer was washed with water, dried over anhydrous Na2SO4, filtered and evaporated. The crude material was purified by flash chromatography using CH2Cl2: EtOAc (80:20) to afford a yellow oil (1.25 g, 95% yield). _
76% With sulfuric acid; In N,N-dimethyl acetamide; water; at 100℃; for 2.5h; General procedure: Other bromoethylarenes were prepared according to literature procedures as shown in the schemes below. Additional bromoethylindoles were prepared by Fischer-type indole synthesis followed by bromination (Campos, K.R. et al . 2004; Mewshaw, R.R. et al . 2004) (Scheme 16), acylation of substituted indoles with oxalyl chloride (Woodward, R.B. et al . 1958) followed by reduction (Feldman, et al . 1986) and bromination (Scheme 17) . 3- (2-bromoethyl) benzofuran (Kozikowski, A. P. et al . 2007; Tomaszewski, Z. et al . 1992) and 3- (2-bromoethyl ) benzothiophene were prepared according to the protocols in Scheme 18. 3-indolylacetaldehyde was prepared by Parikh-Doering oxidation of tryptophol (Sugawara, S. et al . 2009), 3- ( 2-oxoethyl ) -lH-indole-2-carboxylate was prepared from 2- (carboethoxy) indole via literature procedures (Buechi, G. et al . 1977; Vega, A.M. et al . 1981) , and 2- (2-chloroethyl ) benzimidazole was prepared by condensation of o-phenylenediamine and 3- chloropropionic acid (Cowart, M. et al . 2004) (Scheme 19) .
Evaporation of the solvent gave the 2-(5-fluoroindol-3-yl)ethanol (15.2 g) as an oil, which was treated as described in Example 19, starting with the borane trimethylamine reduction followed by acylation, to give the mesylate of the title compound which was refluxed for 2 hours in acetone (200 ml) with LiBr (8.0 g).
  • 32
  • [ 1191-99-7 ]
  • [ 823-85-8 ]
  • [ 101349-12-6 ]
YieldReaction ConditionsOperation in experiment
65% The following reaction procedure was carried out under an N2-atmosphere due to general laboratory safety considerations. 500g of 4-fluorophenylhydrazine hydrochloride (3.08 mol) were suspended in a mixture of 2.5 1 of 2-methyltetrahydrofuran and an aqueous solution of ammonium chloride [350 g ammonium chloride (6.54 mol) in 4650 ml of water]. The suspension was heated to 70 C whereby the 4- flourophenylhydrazine was completely dissolved in the heterogeneous reaction medium formed by the aqueous solution and the organic solvent. Over a period of 1 h, 215.5 g 2,3-dihydrofuran (3.08 mol) dissolved in 2.4 1 2-methyltetrahydrofuran were added to the heterogeneous reaction medium whilst stirring and after completion of the addition, the reaction mixture was stirred at 70 C for an additional 16 to 24 h. The mixture was then cooled to 50 C, and after 15 minutes without stirring to allow phase separation, the organic and aqueous phase were isolated whilst maintaining the temperature at 50 C. To the organic phase a washing solution consisting of 180 g sodium chloride dissolved in 3375 ml of water was added and the mixture was stirred vigorously for 10 minutes at 50 C. Stirring was stopped and the organic phase was allowed to separate from the aqueous phase during 15 minutes and was then isolated, all of which was done whilst maintaining the temperature at 50 C. The organic solvent was removed from the organic phase at 55 C under reduced pressure (98%) in about 65 % yield.
65% With sulfuric acid; In N,N-dimethyl acetamide; water; at 100℃; for 3h; (4-fluorophenyl)hydrazine hydrochloride (2) (16.26 g, 100 mmol) was dissolved in a mixture of N,N-dimethylacetamide (140 mL) and 4% m/m aqueous H2SO4 (140 mL) and heated to 100 oC. 2,3-dihydrofuran (1a) (100 mmol) was then added dropwise over 5 min, and the solution was stirred for 3h at 100 oC. After cooling to room temperature, the mixture was extracted with EtOAc (3×100 mL), the combined organic layer was washed with H2O (3×100 mL), dried over anhydrous Na2SO4, filtered and concentrated. The residue was purified by column chromatography on silica gel (PE/EtOAc = 5:1, V/V) to give compound 3a as an orange oil (11.64 g, 65 %). MS (ESI) m/z: 178.06 [M-H]-.
  • 33
  • [ 124-63-0 ]
  • [ 75-36-5 ]
  • [ 101349-12-6 ]
  • C13H16FNO4S [ No CAS ]
YieldReaction ConditionsOperation in experiment
5-fluoro-indole (15.0 g, 135.2 mmol) was dissolved in dry Et2O (450 ml) and cooled to 0 C. before a solution of oxalyl chloride in dry Et2O (50 ml) was added over 15 min. The mixture was stirred 30 min at 0 C. and 3 hours at room temperature. The crystals were collected by filtration and washed with Et2O to give 19.5 g of solid which was dissolved in EtOH (140 ml) and cooled to 0 C. before triethylamine (9.6 g) was added drop-wise. The mixture was refluxed for 3 hours and stirred at room temperature for 24 hours. The crystals were collected by filtration and washed with H2O and Et2O to give 18.0 g of solid which, after drying in a vacuum oven, was dissolved in dry THF (150 ml) and added drop-wise to a cooled suspension (5-15 C.) of LiAlH4 (16.1 g) in dry THF (350 ml). The mixture was refluxed for 4 hours and cooled to 10 C. After drop-wise addition of H2O (16 ml), aqueous (15%) NaOH (16 ml) and H2O (80 ml), the solution was filtered and evaporated to almost dryness. The remanence was dissolved in EtOAc and dried with MgSO4. Evaporation of the solvent gave the 2-(5-fluoroindol-3-yl)ethanol (15.2 g) as an oil, which was treated as described in Example 19, starting with the borane trimethylamine reduction followed by acylation, to give the mesylate of the title compound which was refluxed for 2 hours in acetone (200 ml) with LiBr (8.0 g). The mixture was cooled, filtered, evaporated and purified by column chromatography using EtOAc:heptane=1:2 as the eluent to give the title compound (9.0 g).
  • 34
  • [ 399-52-0 ]
  • [ 79-37-8 ]
  • [ 64-17-5 ]
  • [ 101349-12-6 ]
YieldReaction ConditionsOperation in experiment
5-fluoro-indole (15.0 g, 135.2 mmol) was dissolved in dry Et2O (450 ml) and cooled to 0 C. before a solution of oxalyl chloride in dry Et2O (50 ml) was added over 15 min. The mixture was stirred 30 min at 0 C. and 3 hours at room temperature. The crystals were collected by filtration and washed with Et2O to give 19.5 g of solid which was dissolved in EtOH (140 ml) and cooled to 0 C. before triethylamine (9.6 g) was added drop-wise. The mixture was refluxed for 3 hours and stirred at room temperature for 24 hours. The crystals were collected by filtration and washed with H2O and Et2O to give 18.0 g of solid which, after drying in a vacuum oven, was dissolved in dry THF (150 ml) and added drop-wise to a cooled suspension (5-15 C.) of LiAlH4 (16.1 g) in dry THF (350 ml). The mixture was refluxed for 4 hours and cooled to 10 C. After drop-wise addition of H2O (16 ml), aqueous (15%) NaOH (16 ml) and H2O (80 ml), the solution was filtered and evaporated to almost dryness. The remanence was dissolved in EtOAc and dried with MgSO4. Evaporation of the solvent gave the 2-(5-fluoroindol-3-yl)ethanol (15.2 g) as an oil, which was treated as described in Example 19, starting with the borane trimethylamine reduction followed by acylation, to give the mesylate of the title compound which was refluxed for 2 hours in acetone (200 ml) with LiBr (8.0 g). The mixture was cooled, filtered, evaporated and purified by column chromatography using EtOAc:heptane=1:2 as the eluent to give the title compound (9.0 g).
  • 35
  • [ 67-56-1 ]
  • [ 443-73-2 ]
  • [ 101349-12-6 ]
YieldReaction ConditionsOperation in experiment
This example demonstrates a general procedure for the synthesis of 3- hydroxyethylindole derivatives 53-55 used in the preparation of compounds in accordance with an embodiment of the invention. See Figure 2.[0083] To a solution of a 2- and/or 5-substituted-indole-3-acetic acid in methanol is added />-toluenesulfonic acid monohydrate (3 eq), and the reaction mixture is stirred at 600C overnight. After neutralization with IN aqueous NaOH, the solvent is evaporated leaving an oily residue, which is dissolved in ethyl acetate. The solution is washed with water, dried over MgSO4, and filtered. The filtrate is evaporated leaving an oily residue, which is subjected to column flush chromatography on silica gel. Elution with a mixture of toluene and acetone (5:1) gives the corresponding ester.[0084] To a solution of the ester in THF is added lithium aluminum hydride (2.8 eq) at 0 0C, and the reaction mixture is stirred at 0 0C for 1 h and at room temperature for 1 h. After addition of ethyl acetate, the reaction mixture is stirred at room temperature for 30 min. The reaction mixture is diluted with ethyl acetate and washed with water, dried over MgSO4, and filtered. The filtrate is evaporated leaving an oily residue, which is subjected to column chromatography on silica gel. Elution with a mixture of toluene and acetone (3:1) gives the pure alcohol.
 

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