Chemoselective Thioacetalization Using 3-(1,3-Dithian-2-ylidene)pentane-2,4-dione as an Odorless and Efficient Propane-1,3-dithiol Equivalent under Solvent-Free Conditions
作者:Dewen Dong、Qun Liu、Yan Ouyang、Chunbai Zheng、Haifeng Yu、Zhenqian Fu
DOI:10.1055/s-2006-950298
日期:2006.11
As a non-thiolic, odorless propane-1,3-dithiol equivalent, 3-(1,3-dithian-2-ylidene)pentane-2,4-dione has been investigated in acid-promoted thioacetalization under solvent-free conditions. A range of selected aldehydes and aliphatic ketones have been converted into the corresponding dithioacetals in high yields. The relatively slow reaction rate of aromatic ketones allowed chemoselective protection of aromatic aldehydes or aliphatic ketones, in contrast to aromatic ketones.
作为一种非硫醇和无气味的丙烷-1,3-二硫醇等效物,3-(1,3-二噻烯-2-亚基)戊烯-2,4-二酮在无溶剂条件下的酸催化下进行了硫缩醛化研究。多种选定的醛和脂肪酮被高产率转化为相应的二硫缩醛。芳香酮相对较慢的反应速率使得对芳香醛或脂肪酮的选择性保护成为可能,而不仅仅是芳香酮。