An Improved Bouveault−Blanc Ester Reduction with Stabilized Alkali Metals
作者:Brian S. Bodnar、Paul F. Vogt
DOI:10.1021/jo802778z
日期:2009.3.20
ester reduction have been developed using sodium in silica gel (Na-SG), a free-flowing powder that can be easily handled in the open atmosphere. Primary alcohols were prepared in excellent yield from a variety of aliphatic esters under mild reaction conditions. The chemistry presented here is far safer than the classic Bouveault−Blanc reduction and is competitive with more modern hydride reduction methods
Metal-catalyzed reactions of ynimides with alcohols to afford β-ketoimides and oxazoles are demonstrated. The triple bond of ynamides is generally activated by mineral acids or metal salts to lead to the regioselective addition of nucleophiles at the α-C-atom, because of the inherent electronic bias. In contrast, the two neighboring carbonyl groups of ynimides decrease the electron density of the triple