Methylene Acetal Formation from 1,2- and 1,3-Diols Using an <i>O</i>,<i>S</i>-Acetal, 1,3-Dibromo-5,5-dimethylhydantoin, and BHT
作者:Tomohiro Maegawa、Yasuyuki Koutani、Kazuki Otake、Hiromichi Fujioka
DOI:10.1021/jo4000256
日期:2013.4.5
A mild and efficient method for formation of methylene acetals from 1,2- and 1,3-diols using methoxymethylphenylsulfide, 1,3-dibromo-5,5-dimethylhydantoin (DBDMH), and dibutylhydroxytoluene (BHT) is described. The use of BHT in this process suppresses side reactions and enables high-yielding formation of methylene acetals of various diols, including carbohydrate-type substrates.
描述了使用甲氧基甲基苯硫醚,1,3-二溴-5,5-二甲基乙内酰脲(DBDMH)和二丁基羟基甲苯(BHT)由1,2-和1,3-二醇形成亚甲基缩醛的温和有效方法。在该方法中使用BHT可抑制副反应,并能高产形成各种二醇(包括碳水化合物型底物)的亚甲基缩醛。