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[ CAS No. 78756-28-2 ] {[proInfo.proName]}

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3d Animation Molecule Structure of 78756-28-2
Chemical Structure| 78756-28-2
Chemical Structure| 78756-28-2
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Product Details of [ 78756-28-2 ]

CAS No. :78756-28-2 MDL No. :MFCD00106648
Formula : C6H3NO3S Boiling Point : -
Linear Structure Formula :- InChI Key :QHTTXSWWWSYDRY-UHFFFAOYSA-N
M.W : 169.16 Pubchem ID :2777552
Synonyms :

Calculated chemistry of [ 78756-28-2 ]

Physicochemical Properties

Num. heavy atoms : 11
Num. arom. heavy atoms : 9
Fraction Csp3 : 0.0
Num. rotatable bonds : 0
Num. H-bond acceptors : 3.0
Num. H-bond donors : 1.0
Molar Refractivity : 40.98
TPSA : 91.31 Ų

Pharmacokinetics

GI absorption : High
BBB permeant : No
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.6 cm/s

Lipophilicity

Log Po/w (iLOGP) : 0.97
Log Po/w (XLOGP3) : 1.03
Log Po/w (WLOGP) : 0.54
Log Po/w (MLOGP) : 0.36
Log Po/w (SILICOS-IT) : 2.85
Consensus Log Po/w : 1.15

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 1.0
Bioavailability Score : 0.55

Water Solubility

Log S (ESOL) : -2.14
Solubility : 1.22 mg/ml ; 0.00719 mol/l
Class : Soluble
Log S (Ali) : -2.54
Solubility : 0.491 mg/ml ; 0.0029 mol/l
Class : Soluble
Log S (SILICOS-IT) : -2.41
Solubility : 0.66 mg/ml ; 0.0039 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 0.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 3.05

Safety of [ 78756-28-2 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P261-P305+P351+P338 UN#:N/A
Hazard Statements:H302-H315-H319-H335 Packing Group:N/A
GHS Pictogram:

Application In Synthesis of [ 78756-28-2 ]

* 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 [ 78756-28-2 ]

[ 78756-28-2 ] Synthesis Path-Downstream   1~87

  • 1
  • [ 75-44-5 ]
  • [ 55341-87-2 ]
  • [ 78756-28-2 ]
YieldReaction ConditionsOperation in experiment
In tetrahydrofuran; toluene; at 20℃; for 2.5h; General procedure: To a solution of the 5-Aryl-3-amino-2-carboxylic acid (III) (5.28 mmol) in THF (50 mL) a solution of phosgene (6.10 mL, 20 wt% in toluene, 11.6 mmol) was added dropwise over a period of 30 min. The reaction mixture was stirred for 2 h at room temperature, followed by the addition of saturated aqueous solution of NaHCO3 (30 mL) and H2O(50 mL). The resulting mixture was extracted with EtOAc/THF (1:1, 3 x 100 mL). The organic layer was washed with saturated aqueous NaCl (100 mL), dried (MgSO4) and concentrated. The crude material was suspended in a mixture of n-hexane/EtOAc (2:1, 50 mL) heated to 50 C and after cooling to room temperature separated via filtration.
  • 2
  • [ 2133-40-6 ]
  • [ 78756-28-2 ]
  • 1-(2-carboxythiophene-3-ylcarbamoyl)pyrrolidine-2-carboxylic acid methyl ester [ No CAS ]
  • 3
  • [ 56-41-7 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-methyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 4
  • [ 56-41-7 ]
  • [ 78756-28-2 ]
  • (S)-2-[(3-aminothiophene-2-carbonyl)amino]propionic acid [ No CAS ]
  • [ 934602-36-5 ]
  • 6
  • [ 338-69-2 ]
  • [ 78756-28-2 ]
  • (R)-3,4-dihydro-3-methyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 7
  • [ 72-18-4 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-isopropyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 8
  • [ 56-45-1 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-hydroxymethyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 9
  • [ 72-19-5 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-(1-hydroxyethyl)-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 10
  • [ 61-90-5 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-isobutyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 11
  • [ 63-68-3 ]
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-[2-(methylsulfanyl)ethyl]-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 12
  • [ 63-91-2 ]
  • [ 78756-28-2 ]
  • (S)-3-benzyl-3,4-dihydro-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 13
  • [ 56-40-6 ]
  • [ 78756-28-2 ]
  • 3,4-dihydro-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 14
  • [ 78756-28-2 ]
  • [ 71-00-1 ]
  • (S)-3-((1H-imidazol-5-yl)methyl)-3,4-dihydro-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 15
  • [ 78756-28-2 ]
  • [ 73-22-3 ]
  • (S)-3-((1H-indol-3-yl)methyl)-3,4-dihydro-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 16
  • [ 72-18-4 ]
  • [ 78756-28-2 ]
  • C11H14N2O5S [ No CAS ]
  • 17
  • [ 61-90-5 ]
  • [ 78756-28-2 ]
  • C12H16N2O5S [ No CAS ]
  • 18
  • [ 63-91-2 ]
  • [ 78756-28-2 ]
  • (S)-3-(3-(1-carboxy-2-phenylethyl)ureido)thiophene-2-carboxylic acid [ No CAS ]
  • 19
  • [ 56-45-1 ]
  • [ 78756-28-2 ]
  • C9H10N2O6S [ No CAS ]
  • 20
  • [ 72-19-5 ]
  • [ 78756-28-2 ]
  • C10H12N2O6S [ No CAS ]
  • 21
  • [ 56-40-6 ]
  • [ 78756-28-2 ]
  • C8H8N2O5S [ No CAS ]
  • 22
  • [ 60-18-4 ]
  • [ 78756-28-2 ]
  • C15H14N2O6S [ No CAS ]
  • 23
  • [ 63-68-3 ]
  • [ 78756-28-2 ]
  • C11H14N2O5S2 [ No CAS ]
  • 24
  • [ 74-79-3 ]
  • [ 78756-28-2 ]
  • C12H17N5O5S [ No CAS ]
  • 25
  • [ 78756-28-2 ]
  • [ 71-00-1 ]
  • C12H12N4O5S [ No CAS ]
  • 26
  • [ 78756-28-2 ]
  • [ 73-22-3 ]
  • C17H15N3O5S [ No CAS ]
  • 27
  • [ 56-84-8 ]
  • [ 78756-28-2 ]
  • C10H10N2O7S [ No CAS ]
  • 28
  • [ 56-86-0 ]
  • [ 78756-28-2 ]
  • C11H12N2O7S [ No CAS ]
  • 29
  • [ 70-47-3 ]
  • [ 78756-28-2 ]
  • C10H11N3O6S [ No CAS ]
  • 30
  • [ 56-85-9 ]
  • [ 78756-28-2 ]
  • C11H13N3O6S [ No CAS ]
  • 31
  • [ 1155-64-2 ]
  • [ 78756-28-2 ]
  • C20H23N3O7S [ No CAS ]
  • 32
  • [ 2799-07-7 ]
  • [ 78756-28-2 ]
  • C28H24N2O5S2 [ No CAS ]
  • 33
  • [ 78756-28-2 ]
  • [ 107-95-9 ]
  • C9H10O5SN2 [ No CAS ]
  • 34
  • [ 70-54-2 ]
  • [ 78756-28-2 ]
  • C12H17N3O5S [ No CAS ]
  • C12H17N3O5S [ No CAS ]
  • 35
  • [ 338-69-2 ]
  • [ 78756-28-2 ]
  • C9H10N2O5S [ No CAS ]
  • 36
  • [ 73-32-5 ]
  • [ 78756-28-2 ]
  • C12H16N2O5S [ No CAS ]
  • 37
  • [ 78756-28-2 ]
  • (R)-5-methyl-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 38
  • [ 78756-28-2 ]
  • (S)-5-isopropyl-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 39
  • [ 78756-28-2 ]
  • (S)-5-isobutyl-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 40
  • [ 78756-28-2 ]
  • (S)-5-benzyl-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 41
  • [ 78756-28-2 ]
  • (S)-tetrahydro-2-(thien-3-yl)-2H-pyrrolo[1,2-c]imidazole-1,3-dione [ No CAS ]
  • 42
  • [ 78756-28-2 ]
  • (S)-5-(hydroxymethyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 43
  • [ 78756-28-2 ]
  • (S)-5-((R)-1-hydroxyethyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 44
  • [ 78756-28-2 ]
  • (S)-5-(4-hydroxybenzyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 45
  • [ 78756-28-2 ]
  • (S)-5-(2-(methylthio)ethyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 46
  • [ 78756-28-2 ]
  • (3-((S)-2,5-dioxo-1-(thien-3-yl)imidazolidin-4-yl)propyl)guanidine hydrochloride [ No CAS ]
  • 47
  • [ 78756-28-2 ]
  • (S)-5-((1H-imidazol-4-yl)methyl)-3-(thien-3-yl)imidazolidine-2,4-dione hydrochloride [ No CAS ]
  • 48
  • [ 78756-28-2 ]
  • (S)-5-((1H-indol-3-yl)methyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 49
  • [ 78756-28-2 ]
  • 2-((S)-2,5-dioxo-1-(thien-3-yl)imidazolidin-4-yl)acetic acid [ No CAS ]
  • 50
  • [ 78756-28-2 ]
  • 3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 51
  • [ 78756-28-2 ]
  • 3-((S)-2,5-dioxo-1-(thien-3-yl)imidazolidin-4-yl)propanoic acid [ No CAS ]
  • 52
  • [ 78756-28-2 ]
  • [ 946619-15-4 ]
  • 53
  • [ 78756-28-2 ]
  • [ 946619-16-5 ]
  • 54
  • [ 78756-28-2 ]
  • (S)-5-(4-aminobutyl)-3-(thien-3-yl)imidazolidine-2,4-dione hydrochloride [ No CAS ]
  • 55
  • [ 78756-28-2 ]
  • C27H22N2S2O2 [ No CAS ]
  • 56
  • [ 78756-28-2 ]
  • (R)-5-(mercaptomethyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 57
  • [ 78756-28-2 ]
  • N-[(3-thienylamino)carbonyl]-β-alanine [ No CAS ]
  • 58
  • [ 78756-28-2 ]
  • (S)-5-methyl-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 59
  • [ 78756-28-2 ]
  • (S)-5-((S)-sec-butyl)-3-(thien-3-yl)imidazolidine-2,4-dione [ No CAS ]
  • 60
  • [ 78756-28-2 ]
  • (S)-3,4-dihydro-3-methyl-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
  • 61
  • [ 78756-28-2 ]
  • [ 231630-08-3 ]
  • 62
  • [ 78756-28-2 ]
  • [ 231630-09-4 ]
  • 63
  • [ 78756-28-2 ]
  • [ 231630-06-1 ]
  • 64
  • [ 78756-28-2 ]
  • 4-methyl-5-phenylthieno<3,2-b>pyridin-7(4H)-one [ No CAS ]
  • 65
  • [ 78756-28-2 ]
  • [ 103979-61-9 ]
  • 66
  • [ 78756-28-2 ]
  • 4-methyl-5-(3,4-methylenedioxyphenyl)thieno<3,2-b>pyridin-7(4H)-one [ No CAS ]
  • 67
  • [ 78756-28-2 ]
  • 5-(3,4-dimethoxyphenyl)-4-methylthieno<3,2-b>pyridin-7(4H)-one [ No CAS ]
  • 68
  • [ 78756-28-2 ]
  • [ 103979-63-1 ]
  • 69
  • [ 78756-28-2 ]
  • [ 103979-62-0 ]
  • 70
  • [ 78756-28-2 ]
  • [ 158461-10-0 ]
  • 71
  • [ 78756-28-2 ]
  • [3-(4-Bromo-2-fluoro-benzyl)-2,4-dioxo-3,4-dihydro-2H-thieno[3,2-d]pyrimidin-1-yl]-acetic acid [ No CAS ]
  • 72
  • [ 78756-28-2 ]
  • [3-(4-Bromo-2-fluoro-benzyl)-6-chloro-2,4-dioxo-3,4-dihydro-2H-thieno[3,2-d]pyrimidin-1-yl]-acetic acid [ No CAS ]
  • 73
  • [ 78756-28-2 ]
  • [ 158460-92-5 ]
  • 74
  • [ 78756-28-2 ]
  • [ 158460-93-6 ]
  • 75
  • [ 78756-28-2 ]
  • furo<2,3-d>thieno<3,2-b>pyridin-5(4H)-one [ No CAS ]
  • 76
  • [ 78756-28-2 ]
  • [ 110109-33-6 ]
  • 77
  • [ 78756-28-2 ]
  • 5,7-dichloro-6-(2-chloroethyl)thieno<3,2-b>pyridine [ No CAS ]
  • 78
  • [ 78756-28-2 ]
  • 5-chloro-6,7-dihydrofuro<2,3-d>thieno<3,2-b>pyridine [ No CAS ]
  • 79
  • [ 78756-28-2 ]
  • [ 110109-32-5 ]
  • 80
  • [ 78756-28-2 ]
  • 4-methoxymethylfuro<2,3-d>thieno<3,2-b>pyridin-5(4H)-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
Example 110A 2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione The title compound was prepared according to the procedure of Fabis, and co-workers as described in Tetrahedron, 1998, 54, 10789-10800. MS (DCI/NH3) m/z 186.9 (M+NH4)+; 1H NMR (300 MHz, DMSO-d6) delta 6.95 (d, J=6 Hz, 1H) 8.25 (d, J=6 Hz, 1H) 12.22 (brs, 1H).
  • 82
  • [ 78756-28-2 ]
  • [ 74-88-4 ]
  • [ 83179-00-4 ]
YieldReaction ConditionsOperation in experiment
26% A mixture of methyl 3-aminothiophene-2-carboxylate (63 mmol, 10.0 g) and ethyl chloroformate (50 ml) was refluxed for 2 hrs and then evaporated to dryness. The residue was dissolved in ethanol (130 ml) and sodium hydroxide (NaOH, 65 mmol, 3.84 g) in water (35 ml) was added. After stirring at room temperature for 48 hrs the mixture was acidified with 1M HCI and diluted with water. The precipitate was collected, washed with water, dried under vacuum and recrystallized from toluene/heptane resulting in 3-ethoxycarbonylamino- thiophene-2-carboxylic acid, (10.2 g, 73%). This acid, (23.2 mmol, 5.0 g), and phosphorus tribromide (12 mmol, 1.14 ml) were dissolved in 1,4-dioxane (50 ml). The mixture was stirred at 100C for 2 hrs and then cooled before it was concentrated on a rotary evaporator. The precipitate formed upon addition of toluene was isolated by filtration giving 1H-thieno[3,2- d][1,3]oxazine-2,4-dione (3.96 g, 100%). This intermediate (20.6 mmol, 3.5 g) was dissolved in DMA (40 ml) and cooled on an ice-bath. NaH (22.7 mmol, 780 mg) was added followed by addition of methyl iodide (25 mmol, 1.6 ml). The mixture was stirred at room temperature overnight and then diethyl malonate (25 mmol, 3.85 ml) and NaH (22.7 mmol, 780 mg) were added. After the addition the mixture was heated at 85C for 2 hrs and then the mixture was cooled. Water was added and the mixture was acidified with 1 M HCl and extracted with chloroform. The extract was dried, concentrated, and chromatographed (Si02, chloroform/methanol/acetic acid; 40/1/0.1) to yield the title compound (1.4 g, 26%). ¹H NMR (CDCl3) : No. 1.45 (3H, t), 3.61 (3H,s), 4.45 (2H,q), 7.00 (lH,d), 7.76 (lH,d), 13.92 (lH,s broad).
  • 83
  • [ 118235-61-3 ]
  • [ 78756-28-2 ]
YieldReaction ConditionsOperation in experiment
100% With phosphorus tribromide; In 1,4-dioxane; at 100℃; for 2h; A mixture of methyl 3-aminothiophene-2-carboxylate (63 mmol, 10.0 g) and ethyl chloroformate (50 ml) was refluxed for 2 hrs and then evaporated to dryness. The residue was dissolved in ethanol (130 ml) and sodium hydroxide (NaOH, 65 mmol, 3.84 g) in water (35 ml) was added. After stirring at room temperature for 48 hrs the mixture was acidified with 1M HCI and diluted with water. The precipitate was collected, washed with water, dried under vacuum and recrystallized from toluene/heptane resulting in 3-ethoxycarbonylamino- thiophene-2-carboxylic acid, (10.2 g, 73%). This acid, (23.2 mmol, 5.0 g), and phosphorus tribromide (12 mmol, 1.14 ml) were dissolved in 1,4-dioxane (50 ml). The mixture was stirred at 100C for 2 hrs and then cooled before it was concentrated on a rotary evaporator. The precipitate formed upon addition of toluene was isolated by filtration giving 1H-thieno[3,2- d][1,3]oxazine-2,4-dione (3.96 g, 100%). This intermediate (20.6 mmol, 3.5 g) was dissolved in DMA (40 ml) and cooled on an ice-bath. NaH (22.7 mmol, 780 mg) was added followed by addition of methyl iodide (25 mmol, 1.6 ml). The mixture was stirred at room temperature overnight and then diethyl malonate (25 mmol, 3.85 ml) and NaH (22.7 mmol, 780 mg) were added. After the addition the mixture was heated at 85C for 2 hrs and then the mixture was cooled. Water was added and the mixture was acidified with 1 M HCl and extracted with chloroform. The extract was dried, concentrated, and chromatographed (Si02, chloroform/methanol/acetic acid; 40/1/0.1) to yield the title compound (1.4 g, 26%). ¹H NMR (CDCl3) : No. 1.45 (3H, t), 3.61 (3H,s), 4.45 (2H,q), 7.00 (lH,d), 7.76 (lH,d), 13.92 (lH,s broad).
  • 84
  • [ 78756-28-2 ]
  • [ 2517-04-6 ]
  • (S)-6,7-dihydroazeto[1,2-a]thieno[3,2-e][1,4]diazepine-5,9(4H,5AH)-dione [ No CAS ]
YieldReaction ConditionsOperation in experiment
With acetic acid; In N-methyl-acetamide; a) A solution of 26.9 g (0.171 mol) of 2H-thieno-[3,2-d][1,3]-oxazine-2,4(1H)-dione and 16.1 g (0.171 mol) of L-azetidine-2-carboxylic acid in 200 ml of dimethylformamide and 40 ml of acetic acid was stirred at 120 for 3 hrs. The brown solution was evaporated and the brown residue obtained was crystallized from ethanol. There were obtained 15.2 g (43%) of (S)-6,7-dihydroazeto[1,2-a]thieno[3,2-e][1,4]diazepine-5,9(4H,5aH)-dione as colorless crystals; m.p. 274.
With acetic acid; In N-methyl-acetamide; a) A solution of 26.9 g (171mmol) of 2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione (EP 27214) and 16.1 g (171 mmol) of L-azetidine-2-carboxylic acid in 200 ml of dimethylformamide and 40 ml of acetic acid was stirred at 120 for 3 hours. The brown solution was evaporated and the brown residue obtained was crystallized from ethanol. There were obtained 15.2 g (43%) of (S)-6,7-dihydroazeto[1,2-a]thieno[3,2-e][1,4]diazepine-5,9(4H,5aH)-dione as a colourless crystallizate of m.p. 274.
  • 85
  • [ 78756-28-2 ]
  • [ 144222-22-0 ]
  • 3-amino-N-(1-tert-butoxycarbonyl-4-piperidylmethyl)thiophene-2-carboxamide [ No CAS ]
YieldReaction ConditionsOperation in experiment
In 1,2-dimethoxyethane; EXAMPLE 16 A solution of <strong>[78756-28-2]2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione</strong> (3.1 g) and 4-(aminomethyl)-1-tert-butoxycarbonylpiperidine (3.9 g) in 1,2-dimethoxyethane (50 ml) was stirred at ambient temperature for 5 hours. The solvent was removed in vacuo and the residue purified by flash chromatography over silica eluding with ether. Appropriate fractions were combined and the solvent evaporated to give 3-amino-N-(1-tert-butoxycarbonyl-4-piperidylmethyl)thiophene-2-carboxamide as a colourless solid (2.57 g).
  • 86
  • [ 64615-13-0 ]
  • [ 78756-27-1 ]
  • [ 71-36-3 ]
  • [ 78756-28-2 ]
YieldReaction ConditionsOperation in experiment
With hydrogenchloride; sodium hydroxide; sodium chloride; In tetrahydrofuran; water; (a) A mixture of 175 g (0.93 mol) of methyl 3-amino-2-thiophenecarboxylate hydrochloride, 1.8 liters of n-butanol and 77 g of sodium hydroxide is heated to boiling under reflux for 30 minutes. After concentration of the resulting suspension on a rotary evaporator, the mixture of sodium 3-amino-2-thiophenecarboxylate and sodium chloride is used directly in the next step. For this purpose, the mixture is treated with 800 ml of water, 280 ml of concentrated hydrochloric acid and 230 ml of tetrahydrofuran. Phosgene is conducted through this mixture at 15-25 C. for 2.5 hours and then air conducted through for 15 minutes. The separated solid material is filtered off under suction, washed with water and dried. There is obtained 2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione of melting point 220-221 C.
  • 87
  • [ 107-97-1 ]
  • [ 78756-28-2 ]
  • 4-methyl-3,4-dihydro-1H-thieno[3,2-e][1,4]diazepine-2,5-dione [ No CAS ]
YieldReaction ConditionsOperation in experiment
In dimethyl sulfoxide; ethyl acetate; (a) A mixture of 30.0 g (177 mmol) of <strong>[78756-28-2]2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione</strong> and 17.3 g (195 mmol) of sarcosine in 100 ml of dimethyl sulphoxide is stirred at 110 C. for 1.5 hours. The dark brown coloured solution is poured into ca 600 ml of ice/water. The separated oil is taken up in ca 200 ml of ethyl acetate and the aqueous phase is evaporated in vacuo until crystallisation begins. The mixture is cooled in an ice-bath for ca 3 hours and the separated material is filtered off under suction and washed with a small amount of water. After drying on a rotary evaporator, there is obtained 3,4-dihydro-4-methyl-2H-thieno[3,2-e][1,4]diazepine-2,5(1H)-dione of melting point 270-272 C.
165 mg In water; for 2h;Reflux; A mixture of <strong>[78756-28-2]1H,2H,4H-thieno[3,2-d][1,3]oxazine-2,4-dione</strong> (CAS No. 78756-28-2) (300 mg, 1.77 mmol), sarcosine (395 mg, 4.43 mmol), and water (10 mL) was heated under reflux for 2 hours. The reaction mixture was cooled to 0 C. The precipitates was collected by filtration, and washed sequentially with water and diethyl ether. The obtained solid was dried under reduced pressure to yield the title compound (165 mg). 1H-NMR (400 MHz, CDCl3) delta (ppm): 3.24 (s, 3H), 4.00 (s, 2H), 6.72 (d, J=5.3 Hz, 1H), 7.52 (d, J=5.3 Hz, 1H), 7.96 (br. s, 1H). MS (ESI) m/z: 197 [M+H]+
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