Bismuth Compounds in Organic Synthesis: Synthesis of Dioxanes, Dioxepines, and Dioxolanes Catalyzed by Bismuth(III) Triflate
作者:Ram Mohan、Daniel Podgorski、Scott Krabbe、Long Le、Paul Sierszulski
DOI:10.1055/s-0030-1258148
日期:2010.8
A simple method for the synthesis of 1,3-dioxolanes from carbonyl compounds has been developed using 1,2-bis(trimethylsilyloxy)ethane in the presence of bismuth(III) triflate as a catalyst. The bismuth(III) triflate catalyzed synthesis of a range of dioxanes and dioxepines has also been developed. In these latter cases, the carbonyl compound is treated with a diol, and triethyl orthoformate is used as a water scavenger. All these methods avoid the use of a Dean-Stark trap.
开发了一种利用1,2-双(三甲基硅氧)乙烷在三氟甲磺酸铋催化下合成醛酮类化合物生成1,3-二氧戊环的简便方法。还开发了三氟甲磺酸铋催化的合成一系列二氧六环和二氧庚环的方法。在这些后者的反应中,醛酮化合物与二醇反应,并使用三乙氧基甲烷作为水分清除剂。所有这些方法都避免了使用Dean-Stark分水器。