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.
本发明涉及一种可以用于有机电子器件,特别是电致发光器件的新型材料,它们是融合芳香系统的衍生物。
Phosphine-Catalyzed Asymmetric Umpolung Addition of Trifluoromethyl Ketimines to Morita-Baylis-Hillman Carbonates
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.