ASKARI S. H.; MOSS S. F.; TAYLOR D. R., J. CHEM. SOC. PERKIN TRANS., PART 1, 1981, NO 2, 360-365
作者:ASKARI S. H.、 MOSS S. F.、 TAYLOR D. R.
DOI:——
日期:——
Thiadiazoles and thiadiazolines. Part 1. Reaction of thiourea and ethylenethiourea with chlorodiazabutadienes: a new route to 4-amidino-1,3,4-thiadiazolines
作者:Syed H. Askari、Stephen F. Moss、David R. Taylor
DOI:10.1039/p19810000360
日期:——
1-Chloro-1,4-diaryldiazabutadienes (1) react with thiourea to give hydrochlorides of 4-amidino-2,5-diaryl-Δ2-1,3,4-thiadiazolines from which the corresponding free bases (2) are obtained by treatment with cold alkali. Imidazolidine-2-thione (ethylenethiourea) reacts similarly with the chlorodiazabutadienes (1a,b) to give, after treatment with cold alkali, 4-(4,5-dihydroimidazolin-2-yl)-2,5-diaryl-Δ2-1