作者:Masashi Ohba、Hiroyuki Kubo、Hiroyuki Ishibashi
DOI:10.1016/s0040-4020(00)00695-5
日期:2000.9
A full account of the first chiral synthesis of (−)-normalindine [(−)-4], an indolopyridonaphthyridine alkaloid isolated from Strychnos johnsonii and Ophiorrhiza filistipula, is presented. Central features of the synthetic strategy include the conversion of l-alanine methyl ester (13) into the oxazole derivative 12 and the intramolecular Diels–Alder reaction of the oxazole–olefin derivatives 27a and
一个完整的帐户的第一手性合成的( - ) - normalindine [( - ) - 4 ]中,indolopyridonaphthyridine生物碱分离自马钱子汉逊和蛇根草属filistipula,呈现。合成策略的主要特征包括将l-丙氨酸甲酯(13)转化为恶唑衍生物12和恶唑-烯烃衍生物27a和30a的分子内Diels-Alder反应。本合成明确地证实了对正茚定所建议的绝对构型的正确性。