Direct Carbohydroxylation of Arylalkenes with Allylic Alcohols: Cooperative Catalysis of Copper, Silver, and a Brønsted Acid
作者:Waqar Ahmed、Sheng Zhang、Xiaoqiang Yu、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1002/anie.201813148
日期:2019.2.18
The cooperative catalysis of copper, silver, and Brønsted acid is presented as a new strategy for olefin functionalization. The catalytic direct carbohydroxylation of arylalkenes with allylic alcohols provided a straightforward and efficient approach for preparing 4,5‐unsaturated alcohols. Synthetically useful functional groups, such as Cl, Br, carbonyl, and chloromethyl, remained intact during the
Allylic alcohol synthesis by Ni-catalyzed direct and selective coupling of alkynes and methanol
作者:Herong Chen、Zhijun Zhou、Wangqing Kong
DOI:10.1039/d1sc02625a
日期:——
nickel-catalyzed direct coupling of alkynes and methanol, providing direct access to valuable allylicalcohols in good yields and excellent chemo- and regioselectivity. The approach features a broad substrate scope and high atom-, step- and redox-economy. Moreover, this method was successfully extended to the synthesis of [5,6]-bicyclic hemiacetals through a cascade cyclization reaction of alkynones and methanol
4,5-Diaryl-.alpha.,.alpha.-bis(polyfluoromethyl)-1H-pyrrole-2-methanethiols , such as 4,5-bis(4-fluorophenyl)-.alpha., .alpha.-bis(trifluoromethyl)-1H-pyrrole-2-methanethiol, useful in treatment of inflammation.
4,5-Diaryl-.alpha.-(polyfluoroalkyl)-1H-pyrrole-2-methanamines such as 4,5-bis(4-fluorophenyl)-.alpha..alpha.-bis-(trifluoromethyl)-1H-pyrrole-2- methanamine, useful in treatment of inflammation.
Asymmetric hydrogenation and allylic substitution reaction with novel chiral pinene-derived N,P-ligands
作者:Xiangyan Meng、Xinsheng Li、Dongcheng Xu
DOI:10.1016/j.tetasy.2009.05.020
日期:2009.7
A series of new chiral tetrahydroquinoline ligands, derived from chiral alpha-pinene, were successfully synthesized. Iridium and palladium complexes of these ligands were proven to be efficient catalysts for enantioselective hydrogenation and allylic substitution reactions with moderate to excellent enantioselectivities (90-95% ee) and high yields. (C) 2009 Elsevier Ltd. All rights reserved.