Synthesis and antimicrobial activity of chiral cis-cycloheximide isomers.
作者:Sachio KUDO、Takayuki ORITANI、Kyohei YAMASHITA
DOI:10.1271/bbb1961.48.2739
日期:——
Such (+)- and (-)-cw-cycloheximide isomers as isocycloheximide (la, lb), a-epiisocycloheximide (2a, 2b) and neocycloheximide (3a, 3b) were synthesized by aldol condensation of (-)-(2R, 4R)- and (+)-(2S, 4S)-cis-2, 4-dimethyl-l-cyclohexanone (5a, 5b), obtained by microbial resolution, with 4-(2-oxoethyl)-2, 6-piperidinedione (7). The absolute configuration of the ( - )-cisketone 5a was confirmed by chemical correlation with natural (2S, 4S, 6S, αR-cycloheximide (4). The newly synthesized isomer, (-)-α-epiisocycloheximide (2b), showed strong antimicrobial activity against S. cerevisiae and P. oryzae close to that of natural cycloheximide (4).
通过醛醇缩合反应,使用通过微生物拆分获得的(-)-(2R, 4R)-和(+)-(2S, 4S)-顺-2, 4-二甲基-1-环己酮(5a, 5b)与4-(2-氧乙基)-2, 6-哌啶二酮(7),合成了(+)和(-)-cw-环己酰亚胺异构体,如异环己酰亚胺(la, lb)、α-表异环己酰亚胺(2a, 2b)和新环己酰亚胺(3a, 3b)。通过化学相关性确认了(-)-顺酮5a的绝对构型与天然(2S, 4S, 6S, αR)-环己酰亚胺(4)的关系。新合成的异构体(-)-α-表异环己酰亚胺(2b)显示出强烈的抗微生物活性,对抗S. cerevisiae和P. oryzae的活性接近天然环己酰亚胺(4)。