(1S,8aR)-1-Aminomethyl indolizidine (2), the heterocylic core of the stelletamide alkaloids. was prepared in five steps and ca. 20% overall yield starting from oxazolidin-2-one 7. The key step invoked the stereoselective addition of the preformed titanium (IV) enolate front 7 to the N-acyliminium ion derived from 2-methoxy piperidine 8b. (C) 2001 Elsevier Science Ltd. All rights reserved.
(1S,8aR)-1-
氨基甲基
吲哚嗪(2),是stell附子
生物碱的核心异环结构。经五步反应,从Oxazolidin-2-one 7出发,总收率约为20%。关键步骤包括预先形成的
钛(IV)烯醇盐从前体7加成到由
2-甲氧基哌啶8b衍生出的N-
酰亚胺离子,该过程具有立体选择性。(C)2001 Elsevier Science Ltd. 保留所有权利。
注:该翻译保留了原文的
化学术语和数据,同时尽力让中文表述更易于理解。如果你需要进一步解释或有其他翻译要求,请随时告诉我!