Triethylamine → N-[2,6-dimethyl-4-(phenylmethoxy)phenyl]hexahydro-3,3-dimethyl-1-oxoimidazo[1,5-a]pyrazine-7(8H)-acetamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 13.36 parts of 2-chloro-N-[2,6-dimethyl-4-(phenylmethoxy)phenyl]acetamide, 6.76 parts of hexahydro-3,3-dimethylimidazo[1,5-a]pyrazin-1(5H)-one, 7.8 parts of N,N-diethylethanamine and 180 parts of N,N-dimethylformamide was stirred for 20 hours at 70° C. The reaction mixture was evaporated. The residue was taken up in water and the product was extracted twice with dichloromethane. The combined extracts were washed with water, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (95:5 by volume) as eluent. The desired fraction was collected and the eluent was evaporated. The residue was crystallized from acetonitrile. The product was filtered off and dried, yielding 11.66 parts (66.8%) of N-[2,6-dimethyl-4-(phenylmethoxy)phenyl]hexahydro-3,3-dimethyl-1-oxoimidazo-[1,5-a]pyrazine-7(8H)-acetamide; mp. 223.8° C. (int. 1).

Provenance & Evidence