Optically active liquid crystal mixtures and liquid crystal devices
申请人:The Secretary of State for Defence in Her Britannic Majesty's Government
公开号:US04149413A1
公开(公告)日:1979-04-17
The present invention discloses chiral thermochromic liquid crystal mixtures which do not contain cholesterol or sterol residues.
本发明揭示了手性热致变色液晶混合物,不含胆固醇或甾醇残留物。
US4149413A
申请人:——
公开号:US4149413A
公开(公告)日:1979-04-17
Iron-Catalyzed Oxyalkylation of Terminal Alkynes with Alkyl Iodides
作者:Weili Deng、Changqing Ye、Yajun Li、Daliang Li、Hongli Bao
DOI:10.1021/acs.orglett.8b03689
日期:2019.1.4
A general oxyalkylation of terminalalkynes enabled by iron catalysis has been developed. Primary and secondary alkyl iodides acted as the alkylating reagents and afforded a range of α-alkylated ketones under mild reaction conditions. Acetyl tert-butyl peroxide (TBPA) was used as the radical relay precursor, providing the initiated methyl radical to start the radical relay process. Preliminary mechanistic