Ru-Photoredox-Catalyzed Decarboxylative Oxygenation of Aliphatic Carboxylic Acids through <i>N</i>-(acyloxy)phthalimide
作者:Chao Zheng、Yuting Wang、Yangrui Xu、Zhen Chen、Guangying Chen、Steven H. Liang
DOI:10.1021/acs.orglett.8b01885
日期:2018.8.17
yl)oxyl (TEMPO) in the presence of rutheniumphotoredoxcatalysis is reported. The key transformation entails a highly efficient photoredox catalytic cycle using Hantzsch ester as a reductant. The ensuing alkoxyamine can be readily converted to the corresponding alcohol in one pot, representing an alternative approach to access aliphatic alcohols under photoredox conditions.
well‐developed and growing body of work in Cu catalysis, the potential of Cu to serve as a photocatalyst remains underexplored. Reported herein is the first example of visible‐light‐induced Cu‐catalyzed decarboxylative C(sp3)−H alkylation of glycine for preparing α‐alkylated unnatural α‐amino acids. It merits mentioning that the mild conditions and the good functional‐group tolerance allow the modification
Reductive decarboxylation of N-(acyloxy)phthalimides via redox-initiated radical chain mechanism
作者:Keiji Okada、Katsura Okubo、Naoto Morita、Masaji Oda
DOI:10.1016/s0040-4039(00)60192-2
日期:1992.11
Highly efficient reductivedecarboxylation of N-(acyloxy)phthalimides which are readily prepared from carboxylic acids was achieved by visible light irradiation using Ru(bpy)3Cl2 as a sensitizer in the presence of BNAH and t-BuSH via radical chain mechanism.
Photochemical chlorodecarboxylation via an electron transfer mechanism
作者:Keiji Okada、Kazushige Okamoto、Masaji Oda
DOI:10.1039/c39890001636
日期:——
A new method of chlorodecarboxylation of carboxylic acids via N-acyloxyphthalimides is developed; the reaction proceeds upon irradiation of N-acyloxyphthalimides in the presence of 1,4-diazabicyclo[2.2.2]octane in ButOH–CCl4–H2O (53:42:5 v/v) in moderate to high yields.
提出了一种通过N-酰氧基邻苯二甲酰亚胺对羧酸进行氯脱羧的新方法。当照射在反应进行Ñ -acyloxyphthalimides在1,4-二氮杂双环[2.2.2]辛烷在卜的存在吨OH-CCL 4 -H 2 O(53:42:5 v / v)在中度到高收率。
Metal-free, visible-light-mediated, decarboxylative alkylation of biomass-derived compounds
作者:Johanna Schwarz、Burkhard König
DOI:10.1039/c6gc01101b
日期:——
This work describes a mild, environmentally friendly method to activate natural carboxylic acids for decarboxylativealkylation. After esterification of biomass-derived acids to N-(acyloxy)phthalimides, the active esters are cleaved reductively by...