4-(2-phenoxyethyl)-1,2,4-triazolone process

Details 4-(2-phenoxyethyl)-1,2,4-triazolone process 4-(2-phenoxyethyl)-1,2,4-triazolone process

C - Chemistry, Metallurgy

07

D

260/466.05, 260/

C07D 249/12 (2006.01) C07C 119/20 (1985.01) C07C 133/00 (1985.01)

Patent

CA 1233826

Abstract of the Disclosure An improved process for the preparation of 5-ethyl-4-(2- phenoxyethyl)-1,2,4-triazolone, a useful intermediate in the synthesis of antidepressant 1,2,4-triazolones typified by 2-[3-[4-(3-chloro- phenyl)-1-piperazinyl]propyl]-5-ethyl-4-(2-phenoxethyl)-2H-1,2,4- triazol-3(4H)-one, also known as nefazodone. The improved process is shorter and higher in yield than the former process, and the starting materials are cheap and readily available.

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