An unexpected yet disciplined course of catalytic Mukaiyama-aldol reaction instead of the expected vinylogous Mukaiyama-aldol reaction has been observed for the reaction of silyloxyfuran with various aldehydes under Lewis acid catalytic control in water-containing solvents.
Regioselective aldol condensations of boron and tin furanolates with aldehydes: an improved synthesis of 2-(1′-hydroxyalkyl)butenolides
作者:Charles W. Jefford、Danielle Jaggi、John Boukouvalas
DOI:10.1039/c39880001595
日期:——
Boron and tin(II) 2-furanolates generated in situ from 2-(5H)-furanone and α-angelica lactone undergo regioselective aldolization with aldehydes to furnish the corresponding 2-(1′-hydroxyalkyl)butenolides in good yields; a new formal synthesis of (±)-litsenolide C1 and (±)-dihydromahubanolide is described.