Photochemistyr of the Nitrogen-Thiocarbonyl Systems. 28. Photoreactions of Thiobarbiturates. Intermolecular Cycloaddition with Alkenes and Ring Contraction Reaction of Trithiobarbiturate.
作者:Haruko TAKECHI、Minoru MACHIDA
DOI:10.1248/cpb.45.1
日期:——
Upon irradiation of mono-, di-, and trithiobarbiturates in the presence of alkenes, [2+2]cycloaddition occurred regioselectively to give thietanes and their desulfurized products. In the case of trithiobarbiturate, a noevl type of ring contraction product, dithiohydantoin, was also obtained.
在烯烃存在的情况下,辐照单-、双-和三硫代巴比妥酸酯时,会发生区域选择性的[2+2]环化反应,生成硫杂环丁烷及其脱硫产物。在三硫代巴比妥酸的情况下,还得到了一种 noevl 型缩环产物--二硫代海因。