Copper-Catalyzed Aerobic Spirocyclization of Biaryl-N-H-imines via 1,4-Aminooxygenation of Benzene Rings
摘要:
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.
Mechanistic Investigations of a Palladium-Diene Catalyzed Suzuki–Miyaura Cross-Coupling Reaction
作者:Xiaoshuang He、Shusheng Zhang、Yinlong Guo、Haoyang Wang、Guoqiang Lin
DOI:10.1021/om300115x
日期:2012.4.23
The mechanism of the first example of a palladium diene catalyzed asymmetric Suzuki–Miyaura cross-coupling reaction has been validated, with the key palladium intermediates captured and characterized. The identified species corresponding to each catalytic step were firmly associated with the diene ligand in our observations. In the ESI-MS/MS experiments by CID (collision-induced dissociation), the
Scalable, Stereocontrolled Formal Syntheses of (+)-Isoschizandrin and (+)-Steganone: Development and Applications of Palladium(II)-Catalyzed Atroposelective C−H Alkynylation
作者:Gang Liao、Qi-Jun Yao、Zhuo-Zhuo Zhang、Yong-Jie Wu、Dan-Ying Huang、Bing-Feng Shi
DOI:10.1002/anie.201713106
日期:2018.3.26
unique structure based on an axially chiral biaryl moiety as well as their significant biological activity. Herein, we describe the development of a palladium‐catalyzed atroposelectiveC−Halkynylation and its application in gram‐scale, stereocontrolledformalsyntheses of (+)‐isoschizandrin and (+)‐steganone. tert‐Leucine was identified as an efficient, catalytic transient chiral auxiliary. A wide
Pd-Catalyzed Atroposelective C–H Allylation and Alkenylation: Access to Enantioenriched Atropisomers Featuring Pentatomic Heteroaromatics
作者:Hao-Ming Chen、Shuo Zhang、Gang Liao、Qi-Jun Yao、Xue-Tao Xu、Kun Zhang、Bing-Feng Shi
DOI:10.1021/acs.organomet.9b00490
日期:2019.10.28
The development of efficient and unified synthetic methods to access enantioenriched pentatomic biaryls is extremely challenging, due to the relatively low rotational barriers of these five-membered atropisomeric species, Described herein is a Pd-catalyzed asymmetric C-H allylation and alkenylation to prepare such atropisomers. This protocol is tolerant of various five-membered biaryls containing benzothiophenes and benzofurans, providing pentatomic biaryls with good to excellent enantioselectivities (up to 99% ee).
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.