157460-18-9Relevant articles and documents
Preparation of Dithiadiazafulvalene Precursors: 2-Piperidino-2,3-dihydro-1,3-thiazoles or 2-Unsabstituted 2,3-Dihydro-1,3-thiazoles from the Reduction of the Corresponding 2-Piperidino Mesoionic Thiazoles
Bssaibis, Mohammed,Robert, Albert,Souizi, Abdel Aziz
, p. 1469 - 1472 (2007/10/02)
Depending on the experimentalconditions, either the 2-piperidino-3-aryl-4-alkylthio-5-aryl- or -alkyl-2,3-dihydro-1,3-thiazoles 8 or the 2-unsubstituted 3-aryl-4-alkylthio-5-aryl- or -alkyl-2,3-dihydro-1,3-thiazoles 10 have been prepared starting from mesoionic 5-alkyl- or 5-aryl-2-piperidino-1,3-thiazole-4-thiolates 6.After alkylation of the mesoionic compound, thebest conditions to isolate thehse two dihydrothiazoles were established froma mechanistic study of the reduction.Compound 8 is known to give dithiadiazafulvalenes through its thiazolium tetrafluoroborate salts.We show here that such salts can also be obtained from 10.