Pyridine → Phenyl N-(4-(4-(4-methoxyphenyl)piperazin-1-yl)phenyl)carbamate

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A mixture of 6 parts of 4-[4-(4-methoxyphenyl)-1-piperazinyl]benzenamine, 3.6 parts of phenyl carbonochloridate, 75 parts of pyridine and 98 parts of dichloromethane was stirred and warmed till all solid entered solution. Stirring was continued for 30 minutes at room temperature. The reaction mixture was poured into 500 parts of water and 210 parts of 2,2'-oxybispropane were added. The whole was stirred for a while. The precipitated product was filtered off and crystallized from 1-butanol, yielding 5.2 parts (61%) of phenyl [4-[4-(4-methoxyphenyl)-1-piperazinyl]phenyl]carbamate; mp. 204.5 (intermediate 18).

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