我们描述了铜催化和质子转移催化的协同利用,使容易获得的N-芳基氨基羰基化合物与简单的 1,3-二烯进行原子和步骤经济的氮杂-[4 + 2] 环加成反应。反应在空气气氛下顺利进行,并产生水作为唯一的副产物。虽然胺可以直接作为 C 和 N 原子供体,但这种操作简单的方案提供了绿色、快速和高效的 1,2,3,6-四氢吡啶,范围广泛。
Regiodivergent Copper Catalyzed Borocyanation of 1,3-Dienes
作者:Tao Jia、Qiong He、Rebecca E. Ruscoe、Alexander P. Pulis、David J. Procter
DOI:10.1002/anie.201806169
日期:2018.8.27
Coppercatalyzed multi‐functionalization of unsaturated carbon‐carbon bonds is a powerful tool for the generation of complex molecules. We report a regiodivergent process that allows a switch between 1,4‐borocupration and 4,1‐borocupration of 1,3‐dienes upon a simple change in ligand. The subsequently generated allyl coppers are trapped in an electrophilic cyanation to selectively generate densely
Intermolecular Hydroamination of 1,3-Dienes To Generate Homoallylic Amines
作者:Xiao-Hui Yang、Alexander Lu、Vy M. Dong
DOI:10.1021/jacs.7b09188
日期:2017.10.11
We report a Rh-catalyzed hydroamination of 1,3-dienes to generate homoallylic amines. Our work showcases the first case of anti-Markovnikov selectivity in the intermolecular coupling of amines and 1,3-dienes. By tuning the ligand properties and Brønsted acid additive, we find that a combination of rac-BINAP and mandelic acid is critical for achieving anti-Markovnikov selectivity.