An efficient synthesis of highlysubstitutedisoquinoliniumsalts from ketimines and alkynes via a Rh(III)-catalyzed C-H bond activation and annulation reaction is described.
Manganese‐catalyzed CH functionalization reactions of ketimines set the stage for the expedient synthesis of cis‐β‐amino acid estersthrough site‐ and regioselective alkene annulations. The organometallic CHactivation occurred efficiently with high functional group tolerance, delivering densely functionalized β‐amino acid derivatives with ample scope.
作者:Weiping Liu、Sven C. Richter、Yujiao Zhang、Lutz Ackermann
DOI:10.1002/anie.201601560
日期:2016.6.27
The first manganese(I)‐catalyzed C−H allylations with ample scope were achieved by carboxylate assistance. The highly selective C−H/C−O functionalizations proved viable with densely substituted allyl carbonates, and the organometallic C−H allylation strategy set the stage for expedient late‐stage diversification with excellent levels of positional selectivity.
通过羧酸盐的辅助作用,第一个锰(I)催化的CH烯丙基化作用范围很大。事实证明,高选择性的C / H / C-O功能化可用于稠密取代的碳酸烯丙酯,有机金属的C-H烯丙基化策略可为后期分散化提供有利的条件,并具有出色的位置选择性。
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