Carbon–Carbon Bond-Forming Reactions of α-Thioaryl Carbonyl Compounds for the Synthesis of Complex Heterocyclic Molecules
作者:James E. Biggs-Houck、Rebecca L. Davis、Jingqiang Wei、Brandon Q. Mercado、Marilyn M. Olmstead、Dean J. Tantillo、Jared T. Shaw
DOI:10.1021/jo201541e
日期:2012.1.6
Treatment of the sulfoxide with i-PrMgCl results in the formation of a magnesium enolate that will undergo an intramolecular Michael addition reaction to form two new stereogenic centers. The relationship between the substitution patterns of the sulfoxide substrate and the efficiency of the magnesium exchange reaction are also described.
描述了由取代内酰胺的α-硫代芳基羰基产物形成碳-碳键的策略。尽管直接官能化是可能的,但氧化和镁亚砜交换的两步法已证明是最佳的。氧化步骤导致形成两个非对映异构体,这些非对映异构体显示出明显不同的消除稳定性,这是根据量子力学计算和X射线晶体学原理合理化的。亚砜的治疗我-PrMgCl导致形成烯醇镁,该烯醇镁将经历分子内迈克尔加成反应以形成两个新的立体异构中心。还描述了亚砜底物的取代模式与镁交换反应的效率之间的关系。