Triethylamine → N-(4-acetyl-2,6-dichlorophenyl)-4-[4-[bis(4-fluorophenyl)amino]butyl]-3-[(methylamino)carbonyl]-1-piperazineacetamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 2.07 parts of N-(4-chlorobutyl)-4-fluoro-N-(4-fluorophenyl)benzenamine, 2.5 parts of N-(4-acetyl-2,6-dichlorophenyl)-3-[(methylamino)carbonyl]-1-piperazineacetamide, 1.3 parts of N,N-diethylethanamine and 97 parts of 2-methoxyethanol was stirred for 3 days at 70° C. The reaction mixture was evaporated and the residue was taken up in water. 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 (98:2 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 a first fraction of 0.74 parts (19.0%) of N-(4-acetyl-2,6-dichlorophenyl)-4-[4-[bis(4-fluorophenyl)amino]butyl]-3-[(methylamino)carbonyl]-1-piperazineacetamide; mp. 87.1° C. The second fraction was collected and the eluent was evaporated. The residue was crystallized from acetonitrile. The product was filtered off and dried, yielding a second fraction of 0.78 parts (20.1%) of N-(4-acetyl-2,6-dichlorophenyl)-4-[4-[bis(4-fluorophenyl)amino]butyl]-3[(methylamino)carbonyl]-1-piperazineacetamide; mp. 85.0° C. Total yield: 1.52 parts (39.1%) of N-(4-acetyl-2,6-dichlorophenyl)-4-[4-bis(4-fluorophenyl)amino]butyl]-3-[(methylamino)carbonyl]-1-piperazineacetamide (compound 97).

Provenance & Evidence