Acetic Anhydride → HCID 53955654, compound
Reaction equation
C(OC(=O)C)(=O)C.O[CH:9]([C:25]1[C:26]([CH3:31])=[N:27][CH:28]=[CH:29][CH:30]=1)[CH:10]1[C:23](=[O:24])[N:14]2[C:15]3[C:20]([C:21]([CH3:22])=[C:13]2[CH2:12][CH2:11]1)=[CH:19][CH:18]=[CH:17][CH:16]=3>N1C=CC=CC=1>[CH3:22][C:21]1[C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[N:14]2[C:23](=[O:24])[C:10](=[CH:9][C:25]3[C:26]([CH3:31])=[N:27][CH:28]=[CH:29][CH:30]=3)[CH2:11][CH2:12][C:13]=12Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 60 °C
Procedure
Acetic anhydride (2.24 g) was added to a solution of 8,9-dihydro-7-[(hydroxy)(2-methylpyridin-3-yl)methyl]-10-methylpyrido[1,2-a]indol-6(7H)-one (1.35 g, a mixture of the isomers A and B) in pyridine (20 ml). After being stirred at 60° C. for 2 hours, the solution was evaporated in vacuo. The residue was diluted with chloroform, washed with brine, dried over anhydrous magnesium sulfate, and evaporated in vacuo. The residue and 1,8-diazabicyclo[5.4.0]undec-7-ene (1.27 g) were dissolved in toluene (30 ml). The solution was stirred at 60° C. for 2 hours and evaporated in vacuo. The residue was crystallized from ethyl acetate to give 8,9-dihydro-10-methyl-7-[(2-methylpyridin-3-yl)methylene]pyrido[1,2-a]indol-6(7H)-one (0.92 g).