Pyrrolidine and Indolizidine Alkaloids from Chiral N-tert-Butanesulfinyl Imines Derived from 4-Halobutanal
作者:Miguel Yus、Francisco Foubelo、Ana Sirvent、Sandra Hernández-Ibáñez
DOI:10.1055/s-0037-1610763
日期:2021.5
efficient stereocontrolled preparation of 2-substituted pyrrolidines and 5-substituted indolizidin-7-ones, by using chiral N-tert-butanesulfinyl imines derived from 4-halobutanal as starting materials, is detailed. Addition of Grignard reagents and a decarboxylative Mannich reaction with β-keto acids involving these chiral imines proceeded with high diastereoselectivity. The synthesis of the pyrrolidinic
详细介绍了通过使用衍生自4-卤代戊二醛的手性N-叔-丁烷亚磺酰基亚胺作为起始原料,有效地立体控制2-取代的吡咯烷和5-取代的吲哚齐丁-7-酮的方法。格氏试剂的添加以及涉及这些手性亚胺的β-酮酸与曼尼希的脱羧反应都具有很高的非对映选择性。吡咯烷类生物碱(–)-古古丁,(+)-维拉他敏B,(–)-去甲肾上腺素,反式-树醛神经碱和(-)-ruspolinone的合成证明了该方法的实用性。