作者:Charles W. Jefford、Qian Tang、Alexander Zaslona
DOI:10.1021/ja00009a043
日期:1991.4
The enantiogenic syntheses of (−)-indolizidine 167B (1) and (+)-monomorine (2) are described. D-Norvaline and L-alanine are converted into their 1-pyrrole derivatives by reaction with 2,5-dimethoxytetrahydrofuran. Thereafter, Arndt-Eistert homologation of the N-alkanoic acid substituent, followed by rhodium (II) acetate catalyzed decomposition of its α-diazo ketone derivative, provides the relevant
描述了 (-)-indolizidine 167B (1) 和 (+)-monomorine (2) 的对映体合成。D-正缬氨酸和 L-丙氨酸通过与 2,5-二甲氧基四氢呋喃反应转化为它们的 1-吡咯衍生物。此后,N-链烷酸取代基的 Arndt-Eistert 同系化,然后乙酸铑 (II) 催化分解其 α-重氮酮衍生物,提供相关的双环前体,其既得手性指导催化氢化,得到 1 和 2。 2 中的 5-丁基侧链是通过从丁酰氯和 L-丙氨酸的吡咯类似物获得的混合酸酐的先前路易斯酸催化重排而制备的