1361252-01-8Relevant academic research and scientific papers
SPIRO-1,1'-BIINDANE-7,7-BISPHOSPHINE OXIDES AS HIGHLY ACTIVE SUPPORTING LIGANDS FOR PALLADIUM-CATALYZED ASYMMETRIC HECK REACTION
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Page/Page column 37, (2015/01/06)
The present invention relates to catalyst complexes comprising palladium (Pd) and at least one spiro-1,1 '-biindane-7,7'- bisphosphine oxide ligand as disclosed herein, and their use. The present invention is further directed to the asymmetric Pd-catalyzed covalent carbon-carbon single bond formation from aryl, heteroaryl and alkenyl triflates and halides and olefins utilising the said catalyst complexes.
Asymmetric intermolecular heck reaction of aryl halides
Wu, Chunlin,Zhou, Jianrong
supporting information, p. 650 - 652 (2014/02/14)
The asymmetric intermolecular Heck reaction has been limited to aryl and vinyl triflates. Herein, we extend the reaction to aryl and vinyl bromides. Various cyclic olefins coupled with high enantioselectivity. Only bisphosphine oxides on a spiro backbone formed highly stereoselective Pd catalysts. The use of alcoholic solvents and alkylammonium salts were essential to promote halide dissociation from neutral arylpalladium complexes.
Highly active catalysts of bisphosphine oxides for asymmetric Heck reaction
Hu, Jian,Lu, Yunpeng,Li, Yongxin,Zhou, Jianrong
, p. 9425 - 9427 (2013/10/01)
Bisphosphine oxides formed highly active asymmetric Heck catalysts, which were applied in asymmetric synthesis of pharmacologically active azacycles. Olefin insertion proceeded via cis pathways, different from P,N-ligands.
Chiral silver phosphate-catalyzed cycloisomeric kinetic resolution of α-allenic alcohols
Wang, Yan,Zheng, Kuan,Hong, Ran
, p. 4096 - 4099 (2012/04/10)
A kinetic resolution of α-allenic alcohols is realized through chiral silver phosphate-catalyzed cycloisomerization with high stereoselectivity (selectivity factor up to 189) and tolerance of a variety of functional groups. A mechanistic model is proposed to interpret the origin of the high stereoselectivity and broad substrate scope.
