The compounds of the following formulas ##STR1## where W is hydrogen, benzyloxycarbonyl, or t-butoxycarbonyl useful as intermediates for preparing piperazine, piperazinone, 1,4-diazepine and 1,4-diazepin-2-one polypeptide compound.
以下
化学式中,W代表氢,苄氧羰基或叔丁氧羰基,这些化合物是制备
哌嗪,
哌嗪酮,1,4-二氮杂环和1,4-二氮杂环-2-酮
多肽化合物的中间体。