P-Chiral Phosphines Enabled by Palladium/Xiao-Phos-Catalyzed Asymmetric P–C Cross-Coupling of Secondary Phosphine Oxides and Aryl Bromides
作者:Qiang Dai、Wenbo Li、Zhiming Li、Junliang Zhang
DOI:10.1021/jacs.9b11938
日期:2019.12.26
for the synthesis of P-chiralphosphine derivatives pose con-siderable challenge. Herein we present a direct Pd/Xiao-Phos-catalyzed cross-coupling reaction of easily accessible sec-ondary phosphine oxides and aryl bromides, which provides a rapid access to P-chiralphosphine oxides. The reaction proceeds efficiently with a wide array of reaction partners to deliver various tertiary phosphine oxides
Novel Materials For Organic Electroluminescent Devices
申请人:Stoessel Philipp
公开号:US20080171225A1
公开(公告)日:2008-07-17
The present invention relates to novel materials which can be used in organic electronic devices, in particular electroluminescent devices, and are derivatives of fused aromatic systems.
highly enantioselective umpolung addition of trifluoromethyl ketimines to Morita–Baylis–Hillman carbonates was developed and it provides facile access to optically active trifluoromethyl amines with a chiraltertiary stereocenter under mild reaction conditions. The salient features of this reaction include general substrate scope, mild reaction conditions, good yields, high enantioselectivity, ease
The enantioselectiveintermolecular cross Rauhut-Currierreaction of acrolein with active olefins has been a long-standing challenge because of competitive MBH reaction and polymerization. Reported herein is a highly enantioselectiveintermolecular...
Copper-Catalyzed Aerobic Spirocyclization of Biaryl-<i>N</i>-H-imines via 1,4-Aminooxygenation of Benzene Rings
作者:Ya Lin Tnay、Cheng Chen、Yi Yuan Chua、Line Zhang、Shunsuke Chiba
DOI:10.1021/ol301583y
日期:2012.7.6
A synthetic method of azaspirocyclohexadienones has been developed through copper-catalyzed aerobic spirocyclization of biaryl-N-H-imines prepared by the reaction of biarylcarbonitriles and Grignard reagents.