Chan–Lam Amination of Secondary and Tertiary Benzylic Boronic Esters
作者:James D. Grayson、Francesca M. Dennis、Craig C. Robertson、Benjamin M. Partridge
DOI:10.1021/acs.joc.1c00976
日期:2021.7.16
We report a Chan–Lamcouplingreaction of benzylic and allylic boronic esters with primary and secondary anilines to form valuable alkyl amine products. Both secondary and tertiary boronic esters can be used as coupling partners, with mono-alkylation of the aniline occurring selectively. This is a rare example of a transition-metal-mediated transformation of a tertiary alkylboron reagent. Initial investigation
我们报告了苄基和烯丙基硼酸酯与伯和仲苯胺的 Chan-Lam 偶联反应,形成有价值的烷基胺产物。仲硼酸酯和叔硼酸酯均可用作偶联伙伴,苯胺的单烷基化选择性发生。这是过渡金属介导的叔烷基硼试剂转化的罕见例子。对反应机理的初步研究表明,从 B 到 Cu 的金属转移是通过单电子而不是双电子过程发生的。
Lee, Ikchoon; Lee, Won Heui; Lee, Hai Whang, Journal of the Chemical Society. Perkin transactions II, 1993, # 2, p. 141 - 146
作者:Lee, Ikchoon、Lee, Won Heui、Lee, Hai Whang、Bentley, T. W.
DOI:——
日期:——
Development of New Hydrogenations of Imines and Benign Reductive Hydroaminations: Zinc Triflate as a Catalyst
The hydrogenation of imines to amines in the presence of catalytic amounts of zinctriflate has been demonstrated for the first time. In addition, an efficient procedure for the reductivehydroamination of alkynes to amines is presented using zinctriflate as a catalyst precursor. In both protocols a variety of different functional groups are tolerated, and the reactions proceed smoothly in high yields