反应详情

Method A (48 h at 60° C.); starting materials: 6-(3-chloropropoxy)-7-ethoxy-2H-1-benzopyran-2-one (example 70) and 1(2-methoxyphenyl)piperazine hydrochloride; yield 49%; fusion point 78°-80° C. (from isopropanol). Fumarate: method E; yield 82%; fusion point 149°-150° C. (from ethanol).

1. customMethod A (48 h at 60° C.)