Synthesis and application of a new hexamethyl-1,1′-spirobiindane-based chiral bisphosphine (HMSI-PHOS) ligand in asymmetric allylic alkylation
作者:Shirui Chang、Lei Wang、Xufeng Lin
DOI:10.1039/c8ob00279g
日期:——
The emerging and versatile application of chiral bisphosphine ligands in diverse asymmetricreactions has resulted in great demand for novel bisphosphine ligands containing different innovative backbones. Herein, a new type of chiral spiro bisphosphine ligand (HMSI-PHOS) has been developed on the basis of a hexamethyl-1,1′-spirobiindane motif. A series of new HMSI-PHOS ligands were synthesized and
Abstract The catalytic activity of a series of chiral heteroaryl coordinated chelating N-heterocyclic carbene (NHC) palladium complexes towards asymmetricallylicalkylation (AAA) were presented here. The effects of different N-substituents, NHC backbones and chelate rings on the catalytic activity and the enantioselectivity of the alkylation of (E)-1,3-diarylallyl acetates with dialkyl malonate were