Iridium catalysed alkylation of tert-butyl cyanoacetate with alcohols under solvent free conditions
摘要:
Ir-catalysed alkylation of rert-butyl cyanoacetate with a range of substituted benzyl and heteroaryl alcohols under solvent free conditions afforded the corresponding monoalkylated products in moderate to high yields. (C) 2008 Flsevier Ltd. All rights reserved.
Ir-catalysed alkylation of rert-butyl cyanoacetate with a range of substituted benzyl and heteroaryl alcohols under solvent free conditions afforded the corresponding monoalkylated products in moderate to high yields. (C) 2008 Flsevier Ltd. All rights reserved.
Kinetic and Dynamic Kinetic Resolution of Racemic Tertiary Bromides by Pentanidium‐Catalyzed Phase‐Transfer Azidation
作者:Jingyun Ren、Xu Ban、Xin Zhang、Siu Min Tan、Richmond Lee、Choon‐Hong Tan
DOI:10.1002/anie.202000138
日期:2020.6.2
azides and bromides through pentanidium-catalyzed kinetic resolution (KR) of racemic tertiary bromides under base-free conditions. We found that the absence of water is crucial to attain a high selectivity factor (s). On the other hand, new experimental observations and DFT modeling led us to propose that enantioconvergent azidation of tertiary bromides proceeded through dynamic kinetic resolution