3-Bromopropenyl Methyl Carbonate: A New Reagent for the α-Hydroxy Allylation Reaction of Aldehydes in Water
作者:Marco Lombardo、Claudio Trombini、Filippo Pasi、Caterina Tiberi
DOI:10.1055/s-2005-872144
日期:——
3-Bromopropenyl methyl carbonate reacts smoothly with aldehydes in the presence of zinc in a mixture of saturated aqueous NH 4 Cl and THF (9:1). Monoprotected alk-1-en-3,4-diols are formed in high yields and in short reaction times. The reaction is diastereoselective, saturated aldehydes afford anti-adducts, while α,β-unsaturated and aromatic aldehydes preferentially give the synisomers. Very simple
在饱和水 NH 4 Cl 和 THF (9:1) 的混合物中,3-溴丙烯基甲基碳酸酯在锌存在下与醛类顺利反应。单保护的 alk-1-en-3,4-二醇以高产率和短反应时间形成。该反应是非对映选择性的,饱和醛产生反加合物,而α,β-不饱和醛和芳香醛优先产生同异构体。还报道了将 alk-1-en-3,4-二醇的中间体单碳酸酯衍生物转化为环状碳酸酯的非常简单的条件。