Thiadiazoles and thiadiazolines. Part 2. Δ<sup>2</sup>-1,3,4-Thiadiazoline-4-carboxamidines derived from substituted acyclic thioureas
作者:Stephen F. Moss、David R. Taylor
DOI:10.1039/p19820001981
日期:——
4-diphenyl-2,3-diazabutadiene (1) and the following thioureas: N-methylthiourea, N,N′-dimethylthiourea, N,N,N′-trimethylthiourea, N-allylthiourea, and N-phenylthiourea. Their spectroscopic properties are discussed, with particular reference to the amidine tautomerism. Attempts to achieve corresponding reactions between compound (1) and sterically hindered thioureas were unsuccessful. N,N′-Diphenylthiourea was
一系列的Δ 2 -1,3,4-噻二唑啉-4-甲脒(2B-f)和相应的脒鎓氯化物已在70-92%的产率的1-氯-1,4-二苯基-2-之间制备了反应,3- diazabutadiene(1)和下面的硫脲:ñ -methylthiourea,ñ,ñ '-dimethylthiourea,ñ,ñ,ñ '-trimethylthiourea,ñ -allylthiourea,和ñ -phenylthiourea。讨论了它们的光谱性质,特别是the互变异构现象。尝试实现化合物(1)与空间受阻的硫脲之间的相应反应是不成功的。ñ,ñ'-Diphenylthiourea转化成3-苯胺基4,5-二苯基-4- ħ -1,2,4-三唑(6),最初分离为它的盐酸盐; Ñ,Ñ ' -二-叔-丁基硫脲,得到2,5-二苯基-1,3,4-噻二唑(8)(36%),4-(1-diazabutadienyl)-Δ 2 -1,3,