Mercury(II) Chloride-Mediated Cyclization−Rearrangement of <i>O</i>-Propargylglycolaldehyde Dithioacetals to 3-Pyranone Dithioketals: An Expeditious Access to 3-Pyranones
作者:Subir Ghorai、Anup Bhattacharjya
DOI:10.1021/ol047893a
日期:2005.1.1
O-Propargyl glycolaldehyde dithioacetals undergo a unique cyclization-rearrangement in the presence of mercuric chloride and calcium carbonate to afford 3-pyranones exclusively or along with 2,5-dihydrofuran-3-carboxaldehydes via their dithioketals and dithioacetals.