A New Cyclisation of Sulfenylated Dimethyl Sulfoxide and Thiosemicarbazone Adducts using Thionyl Chloride†
作者:Lal Dhar S. Yadav、Daya R. Pal
DOI:10.1039/a605234g
日期:——
Adducts (4aâd) obtained by nucleophilic
addition of sulfenylated dimethyl sulfoxide derivatives (2a,b) to
thiosemicarbazones (3a,b) undergo a new intramolecular
cyclisation, involving deoxygenative demethylation, to yield
5-sulfenylated 4-aryl-2-thiocarbamoyl-1,2,3-thiadiazolidines
(7aâd) on treatment with thionyl chloride.
硫代氨基脲(3a,b)与亚磺酰基二甲基亚砜衍生物(2a,b)通过亲核加成反应得到的加合物(4aâd)在经过亚硫酰氯处理后,会发生新的分子内环化反应,包括脱氧去甲基化反应,生成 5-亚磺酰基 4-芳基-2-硫代氨基甲酰基-1,2,3-噻二唑烷(7aâd)。