title: Anti-selective vicinal silaboration and diboration of alkynoates through phosphine organocatalysis.
abstract: Trialkylphosphine organocatalysts have enabled anti-selective vicinal silaboration and diboration of the C-C triple bond in alkynoates to produce β-boryl-α-silyl acrylates and α,β-diboryl acrylates, respectively. The anti stereoselectivity was complete and robust. A variety of functional groups were tolerated in the alkynoates. The two vicinally installed heteroatom substituents of the β-boryl-α-silyl acrylates and α,β-diboryl acrylates could be differentiated and transformed in a stepwise manner, allowing the synthesis of a diverse array of unsymmetrical tetrasubstituted alkenes.
authors: Department of Chemistry, Faculty of Science, Hokkaido University , Sapporo 060-0810, Japan.
authors: Kazunori
authors: K
authors: Nagao
authors: Hirohisa
authors: H
authors: Ohmiya
authors: Masaya
authors: M
authors: Sawamura