The first asymmetrichydrogenation of acyclic tetrasubstituted α,β-unsaturated amides has been achieved by usingRh/DuanPhos complex as a catalyst, delivering chiral β-amino amides with two contiguous chiral centers in excellent yields and high enantioselectivities (up to 99% yield, 96% ee), which provides efficient and concise access to valuable β-amino amide derivatives. The gram-scale reaction and
Bobranski, Acta Poloniae Pharmaceutica, 1953, vol. 10, p. 1,5
作者:Bobranski
DOI:——
日期:——
Ligand‐Controlled Regiodivergent Cyanoboration of Internal Allenes by Copper Catalysis
作者:Hui Hu、Guo‐Cui Ji、Linjuan Jiang、Siwei Bi、Yuan‐Ye Jiang、Yuanhong Liu
DOI:10.1002/anie.202210338
日期:2022.12.19
The first copper-catalyzed regiodivergent cyanoboration of internal allenes with B2pin2 and NCTS derivatives has been developed. MeOH was identified as the necessary additive for the regeneration of LCu-Bpin species. Computational studies revealed that the copper-mediated allylic cyanation is the regio- and stereo-determining step, while the MeOH-assisted transmetalation with B2pin2 is the rate-determining
已经开发出第一个铜催化的具有 B 2引脚2和 NCTS 衍生物的内部丙二烯区域发散氰基硼化反应。MeOH 被确定为 LCu-Bpin 物种再生的必要添加剂。计算研究表明,铜介导的烯丙基氰化作用是区域和立体决定步骤,而甲醇辅助的 B 2 pin 2金属转移是速率决定步骤。