(R,R)-Ru(salen)(CO) complex (1) was found to catalyze enantioselective aziridination of conjugated terminal olefins and allylic C–H amination of conjugated olefins bearing geminal- and/or trans-substituent(s) in the presence of p-toluenesulfonyl azide.
Nickel-Catalyzed Arylboration of Alkenylarenes: Synthesis of Boron-Substituted Quaternary Carbons and Regiodivergent Reactions
作者:Liang-An Chen、Alan R. Lear、Pin Gao、M. Kevin Brown
DOI:10.1002/anie.201904861
日期:2019.8.5
A method for the construction of boron‐substituted quaternary carbons or diarylquaternary carbons by arylboration of highly substituted alkenylarenes is presented. A wide range of alkenes and arylbromides can participate in this reaction thus allowing for a diverse assortment of products to be prepared. In addition, a solvent dependent regiodivergent arylboration of 1,2‐disubstituted alkenylarenes
Selective Catalytic C–H Alkylation of Alkenes with Alcohols
作者:Dong-Hwan Lee、Ki-Hyeok Kwon、Chae S. Yi
DOI:10.1126/science.1208839
日期:2011.9.16
A ruthenium catalyst forms carbon-carbon bonds between olefins and alcohols while liberating only water as a by-product. Alkenes and alcohols are among the most abundant and commonly used organic feedstock in industrial processes. We report a selective catalytic alkylation reaction of alkenes with alcohols that forms a carbon-carbon bond between vinyl carbon-hydrogen (C–H) and carbon-hydroxy centers
Copper-Catalyzed Ligand-Free Diazidation of Olefins with TMSN<sub>3</sub> in CH<sub>3</sub>CN or in H<sub>2</sub>O
作者:Huan Zhou、Wujun Jian、Bo Qian、Changqing Ye、Daliang Li、Jing Zhou、Hongli Bao
DOI:10.1021/acs.orglett.7b02982
日期:2017.11.17
An environmentally benign, copper-catalyzed diazidation of a broad range of olefins, including vinylarenes, unactivated alkenes, allene, and dienes, under mild conditions with TMSN3 (trimethylazidosilane) as azido source, has been developed. This reaction can be carried out in organic solvent or in aqueous solution where water is the sole solvent. The functional group compatibility of this reaction
Enantio- and Regioselective Intermolecular Benzylic and Allylic CH Bond Amination
作者:Yota Nishioka、Tatsuya Uchida、Tsutomu Katsuki
DOI:10.1002/anie.201208906
日期:2013.2.4
Smooth salen: Ru(CO)–salen complex 1 is an effective catalyst for asymmetric benzylic and allylic CH bond amination using 2‐(trimethylsilyl)ethanesulfonyl azide (SESN3) as the nitrene source. The reaction proceeded with high enantioselectivity and excellent regioselectivity. An ethyl group can be selectively aminated, even in the presence of an n‐propyl group. No migration or isomerization of the