Acetic Anhydride → HCID 10763816, compound

HRID 374106Notes

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-17db9b77784d49e5be1be96a6793ab8d
Source dataset: uspto-grants-1992_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05166341

Reaction notes

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