Isolation of Pure Disubstituted E Olefins through Mo-Catalyzed Z-Selective Ethenolysis of Stereoisomeric Mixtures
摘要:
Monoaryloxide-pyrrolide (MAP) complexes of molybdenum were employed for the selective ethenolysis of 1,2-disubstituted Z olefins in the presence of the corresponding E olefins. Reactions were performed in the presence of 0.02-3.0 mol % catalyst at 22 degrees C under 20 atm ethylene. We have demonstrated that the Z isomer of an easily accessible E:Z mixture can be destroyed through ethenolysis and the E alkene thereby isolated readily in high yield and exceptional stereoisomeric purity.
The present invention relates generally to catalysts and processes for the Z-selective formation of internal olefin(s) from terminal olefin(s) via homo-metathesis reactions.
本发明通常涉及催化剂和过程,用于通过同型交换反应从末端烯烃中Z-选择性地形成内部烯烃。
Highly Z-selective olefins metathesis
申请人:Massachusetts Institute of Technology
公开号:US09079173B2
公开(公告)日:2015-07-14
The present invention relates generally to catalysts and processes for the Z-selective formation of internal olefin(s) from terminal olefin(s) via homo-metathesis reactions.
本发明涉及催化剂和过程,用于通过同型烯烃交换反应从末端烯烃中Z-选择性地形成内部烯烃。
Electrochemical Synthesis of trans-Olefins from Buta-1,3-dienes and Alkyl Halides
作者:Chao Yang、Wujiong Xia、Haoxiang Zhang、Lin Guo
DOI:10.1055/a-2006-1285
日期:——
electrochemical alkylation reaction of buta-1,3-diene derivatives with alkylhalides has been developed, generating highly selective trans-olefins as major products. This method exhibits significant advantages, including simple operation, mild conditions, and convenience of scale-up, and provides a novel route for the synthesis of trans-olefins.