Metal mediated C–S rupture of heterocyclic thioamides : in situ generation of 2,2′-thio-di-2-imidazoline, 1,1′-dimethyl-2,2′-di-imidazolylsulfide, SO42− and their variable coordination to CuII
The ureidation reactions of 2- and 4-picolineN-oxides with 2-chloro-4,5-dihydroimidazole are described. A mechanism of novel thioureidation reaction of 4-picolineN-oxide with 2-(4,5-dihydro-1H-imidazol-2-ylthioxy)-4,5-dihydro-1H-imidazole is proposed. Structural assignment is confirmed by 1H and 13C nmr as well as by X-ray crystallography.
描述了2-和4-甲基吡啶N-氧化物与2-氯-4,5-二氢咪唑的缩合反应。提出了4-甲基吡啶N-氧化物与2-(4,5-二氢-1 H-咪唑-2-基硫醇基)-4,5-二氢-1 H-咪唑的新型硫脲化反应机理。通过1 H和13 C nmr以及X射线晶体学确定结构归属。
RIED W.; MERKEL W.; PARK S.-W., J. LIEBIGS ANN. CHEM. <JLAC-BF>, 1975, NO 1, 79-88