Palladium-Catalyzed Ring-Closing Reaction via C–N Bond Metathesis for Rapid Construction of Saturated <i>N</i>-Heterocycles
作者:Bangkui Yu、Suchen Zou、Hongchi Liu、Hanmin Huang
DOI:10.1021/jacs.0c10615
日期:2020.10.28
The ring-closingreactions based on chemical bond metathesis enable the efficient construction of a wide variety of cyclic systems which receive broad interest from medicinal and organic communities. However, the analogous reaction with C-N bond metathesis as a strategic fundamental step remains an unanswered challenge. Herein, we report the design of a new fundamental metallic C-N bond metathesis reaction
A ligand-controlled palladium-catalyzed highly regioselective and diastereodivergent aminomethylative annulation of dienyl alcohols with aminals has been established, which allows for producing either cis- or trans-disubstituted isochromans in good yields with complete regioselectivity and good to excellent diastereoselectivity. Moreover, the chiral cis-products were also obtained in good yields with
已经建立了一种配体控制的钯催化的高区域选择性和非对映异构性氨基甲基化二烯醇与缩醛胺的环化反应,它可以以良好的产率产生具有完全区域选择性和良好至优异的非对映选择性的顺式或反式二取代异色满烷。此外,通过使用手性膦酰胺作为配体,还以良好的收率获得了高达 94% ee的手性顺式产物。机理研究表明,羟基在促进 Pd 催化的 Heck 插入区域选择性地发生在共轭二烯的内部 C C 键中起关键作用。