Acetic Anhydride → (+)-1-(4-Nitrophenyl)-3-acetyl-4-methyl-7,8-methylenedioxy-3,4-dihydro-5H-2,3-benzodiazepine

HRID 440289Notes

Reaction equation

HRID 440289 reaction equation
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([C:10]2[C:16]3[CH:17]=[C:18]4[O:23][CH2:22][O:21][C:19]4=[CH:20][C:15]=3[CH2:14][CH:13]([CH3:24])[NH:12][N:11]=2)=[CH:6][CH:5]=1)([O-:3])=[O:2].[C:25](OC(=O)C)(=[O:27])[CH3:26]>O>[N+:1]([C:4]1[CH:5]=[CH:6][C:7]([C:10]2[C:16]3[CH:17]=[C:18]4[O:23][CH2:22][O:21][C:19]4=[CH:20][C:15]=3[CH2:14][CH:13]([CH3:24])[N:12]([C:25](=[O:27])[CH3:26])[N:11]=2)=[CH:8][CH:9]=1)([O-:3])=[O:2]

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 103364221-(4-Nitrophenyl)-4-methyl-7,8-methylenedioxy-3,4-dihydro-5H-2,3-benzodiazepine

Product 1

HCID 9976222(+)-1-(4-Nitrophenyl)-3-acetyl-4-methyl-7,8-methylenedioxy-3,4-dihydro-5H-2,3-benzodiazepine

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A 2.0 g (6.15 mmol) portion of the product of Example 26 was stirred with 10 ml of acetic anhydride at 25° C. for 3 hours then 50 ml of distilled water were added and the stirring was continued for one hour. The yellow precipitate formed was filtered, washed with 3×10 ml of distilled water and dried at 80°-100° C. to obtain 2.6 g of raw product. After recrystallization from 10 ml of ethanol 1.94 g (85.8%) of the aimed product were obtained, m.p.: 140°-142° C.

Workup

  1. customThe yellow precipitate formed
  2. filtrationwas filtered
  3. washwashed with 3×10 ml of distilled water
  4. customdried at 80°-100° C.

Sources & evidence

ORD record
ord-d29db75f0166405aad937a8a998a70b4
Source dataset
uspto-grants-1996_05
Patent number
US05519019

Reaction notes

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