The firstexample of lead-promoted “Barbier-type” (in situ Grignard) reaction has been demonstrated by the reaction of propargyl bromide with aldehydes in a Pb/Bu4NBr/Me3SiCl/DMF system.
Synthesis of β-Hydroxy Ketones and Vinylsilanes from Homopropargylic Alcohols by Intramolecular Hydrosilation
作者:James A. Marshall、Mathew M. Yanik
DOI:10.1021/ol0061182
日期:2000.7.1
nonracemic homopropargylic alcohols affords the corresponding five-membered cyclic siloxanes regiospecifically. Oxidation or alkylmetal addition converts these intermediates into beta-hydroxy ketones or vinylsilanes under mild conditions.