中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1,4-diacetyl-2,5-dibenzylpiperazine-3,6-dione | 59552-68-0 | C22H22N2O4 | 378.428 |
A reinvestigation of the reduction of 3,6-dibenzylidenepiperazine-2,5-dione (1) with zinc and acetic acid established that this reaction gave (Z)-6-benzyl-3-benzylidenepiperazine-2,5-dione (10). When a mixture of acetic acid and hydrochloric acid was used in the reduction, a mixture of trans- (12) and cis-3,6-dibenzylpiperazine-2,5-dione (5) was obtained. Direct catalytic reduction of 3,6-di(2-chloro- benzy1idene)piperazine-2,5-dione (2) to (�)-cis-3,6-di(2-chlorobenzyl)piperazine-2,5-dione (6) was also accomplished.