Organozinc reagents in synthesis: the facile generation of 2-(trialkylsilyl)prop-2-enylzinc from 2-bromo-1-trimethylsilylprop-2-ene
作者:James J. Eshelby、Philip J. Parsons、Patrick J. Crowley
DOI:10.1039/p19960000191
日期:——
A range of electrophiles react with 2-(trimethylsilyl)prop-2-enylzinc chloride, which is prepared by sequentially treating 2-bromo-1-trimethylsilylprop-2-ene with ButLi and then zinc chloride. The addition of transition metal catalysts can alter the reactivity of the organometallic compound from prop-2-enylation to prop-1-en-2-ylation.
Asymmetric hydrogenation of 1-silyl-1-substituted alkenes for preparation of optically active silanes
作者:Dan-Dan Ma、Peiming Gu、Rui Li
DOI:10.1016/j.tetlet.2016.11.017
日期:2016.12
Asymmetrichydrogenation of 1-silyl-1-substituted alkenes has been explored, producing eight optically active silanes with good to excellent enantioselectivity (66–99% ee) and yield (74–99%). The reaction was efficiently catalyzed by the cationic N,P-Ir complexes, and the polar solvents were found to be essential for the stereocontrol of the conversion.