Diastereoselective Addition of Prochiral Nucleophilic Alkenes to α-Chiral <i>N</i>-Sulfonyl Imines
作者:David A. Gutierrez、James Fettinger、K. N. Houk、Kaori Ando、Jared T. Shaw
DOI:10.1021/acs.orglett.1c04219
日期:2022.2.11
to chiral α-alkoxy N-tosyl imines is described. Alkene geometry is selectively transferred to the newly formed carbon–carbon bond, resulting in stereochemical control of C1, C2, and C3 of the resulting 2-alkoxy-3-N-tosyl-4-alkyl-5-hexene products. A computational analysis to elucidate the high selectivity is also presented. This methodology was employed in the synthesis of two naturally occurring isomers
描述了路易斯酸促进前手性E-和Z-烯丙基亲核试剂与手性 α-烷氧基N-甲苯磺酰基亚胺的加成。烯烃几何结构选择性地转移到新形成的碳-碳键上,从而对所得 2-烷氧基-3- N-甲苯磺酰基-4-烷基-5-己烯产物的 C1、C2 和 C3 进行立体化学控制。还提出了阐明高选择性的计算分析。该方法用于合成两种天然存在的硫磺酰胺异构体。