Enantioselective Total Synthesis of 1,3-Disubstituted β-Carboline Alkaloids, (-)-Dichotomine A and (+)-Dichotomide II
作者:Shinji Tagawa、Tominari Choshi、Asuka Okamoto、Takashi Nishiyama、Shiroh Watanabe、Noriyuki Hatae、Minoru Ishikura、Satoshi Hibino
DOI:10.1002/ejoc.201201652
日期:2013.3
(S)-(–)-Dichotomine A and its enantiomer were synthesized from the key intermediate, methyl 1-(1-hydroxyethyl)-β-carboline-3-carboxylate, by enantioselective esterification with Lipase QLM. The first total synthesis of (+)-dichotomide II and its enantiomer were also achieved from (S)-(–)-dichotomine A methyl ester and its enantiomer. The absolute configuration of the stereogenic center of the reported
(S)-(-)-Dichotomine A 及其对映体是由关键中间体 1-(1-羟乙基)-β-咔啉-3-羧酸甲酯通过脂肪酶 QLM 的对映选择性酯化合成的。(+)-dichotomide II 及其对映体的首次全合成也是由 (S)-(-)-dichotomine A 甲酯及其对映体实现的。报告的 (+)-dichotomide II 的立体中心的绝对构型被确定为 R。