Reaction of Optically Active α-Aminoallenylstannanes with Aldehydes Formed in Situ from the Lewis-Acid-Catalyzed Rearrangement of Epoxides
作者:Cristóbal de los Ríos、Louis S. Hegedus
DOI:10.1021/jo050813b
日期:2005.8.1
Reaction of optically active α-oxazolidinonylallenylstannanes with oxiranes in the presence of BF3·OEt2 produced β-hydroxypropargylamines with high syn diastereoselectivity and high enantioselectivity through an initial Lewis-acid-catalyzed rearrangement of the oxirane to the corresponding aldehyde via an alkyl, aryl, or hydride shift. This permits the use of readily available oxiranes as alternatives