Acetic Anhydride → HCID 10763816, compound

HRID 2051185Notes

Reaction equation

[CH2:1]([N:8]1[CH2:14][CH:13]([NH:15][C:16]([C:18]2[C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[NH:20][N:19]=2)=[O:17])[CH2:12][N:11]([CH3:27])[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:28](OC(=O)C)(=[O:30])[CH3:29]>ClCCl>[CH2:1]([N:8]1[CH2:14][CH:13]([NH:15][C:16]([C:18]2[C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[N:20]([C:28](=[O:30])[CH3:29])[N:19]=2)=[O:17])[CH2:12][N:11]([CH3:27])[CH2:10][CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 25 °C

Procedure

To a solution of N-(1-benzyl-4-methylhexahydro-1H-1,4-diazepin-6-yl)-1H-indazole-3-carboxamide (1.0 g) in dichloromethane (10 ml), acetic anhydride (0.56 g) is added; and the mixture is stirred at 25° C. for 16 hours. The reaction mixture is washed with saturated sodium bicarbonate and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the residue is chromatographed on silica gel with elution of acetone. Fractions containing the title compound are pooled and evaporated under reduced pressure to give the title compound (0.92 g) as an oil. The free base thus obtained is converted to the fumarate 1/4 hydrate of the title compound in a usual manner, m.p. 166-168° C. (recrystallized from ethanol).

Workup

washThe reaction mixture is washed with saturated sodium bicarbonate
dry with materialdried over sodium sulfate
customThe solvent is evaporated under reduced pressure
customthe residue is chromatographed on silica gel with elution of acetone
additionFractions containing the title compound
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-55381c5c23cc40f399c5e8db041a9230
Source dataset: uspto-grants-1991_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05017573

Reaction notes

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