On the reaction of isothiosemicarbazides with heterocumulenes. Part I
作者:Steffen Ernst、Klaus Schulze
DOI:10.1002/jhet.5570330135
日期:1996.1
Isothiosemicarbazides 2 react with acyl isothiocyanates under addition-cyclization to yield 1,3,4-thiadiazoline-2-imines 3 as well as the isomeric 2-amino-substituted 1,3,4-thiadiazolium-5-acylaminides 3′. In a similar manner the 2-hydrazino-substituted 1,3-thiazoline 4 adds ethoxycarbonyl isothiocyanate to give the thiosemicarbazide 5, which undergoes a rearrangement to the 1,3,4-thiadiazoline-2-imine
异硫代氨基脲2在加成环化下与酰基异硫氰酸酯反应,生成1,3,4-噻二唑啉-2-亚胺3以及异构体2-氨基取代的1,3,4-噻二唑-5-酰基亚酰胺3'。以类似的方式,2-肼基取代的1,3-噻唑啉4添加乙氧基羰基异硫氰酸酯以得到硫代氨基脲5,其重排至1,3,4-噻二唑啉-2-亚胺5'。还讨论了涉及乙氧基羰基异(硫)氰酸酯的3d的[2 + 2]环还原以及3'f和h的热诱导Dimroth重排。