Talukdar, P. D.; Sengupta, S. K.; Datta, A. K., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 7, p. 538 - 542
3-Substituted thieno [2, 3-d] pyrimidin-4(3H)-one-2-mercaptoacetic acids and their ethylesters were synthesized from 2-mercaptothieno [2, 3-d] pyrimidin-4(3H]-ones, which were obtained by cyclization of thienylthioureas in acidic medium. Analgesic, anti-inflammatory, and anticonvulsant activities were found in some of these compounds. Significant antimicrobial activity was exhibited by thienylthioureas
Stereoselective synthesis of (<i>E</i>)-halomethylidene[1,3]thiazolo[3,2-<i>a</i>]thieno[3,2-<i>e</i>]pyrimidinium and analogous [1,3]oxazolo[3,2-<i>a</i>]thieno[3,2-<i>e</i>]pyrimidinium halides starting from 3-<i>N</i>-substituted 2-propargylthio(oxy)thieno[2,3-<i>d</i>]pyrimidin-4-ones
Abstract A convenient procedure for the stereoselective synthesis of [1,3]thiazolo[3,2-a]thieno[3,2-e]pyrimidinium halides and analogous [1,3]oxazolo[3,2-a]thieno[3,2-e]pyrimidinium halides 5 and 6 is reported. 2-Propargylthio-3-R-thieno[2,3-d]pyrimidin-4-ones and 2-propargyloxy-3-R-thieno[2,3-d]pyrimidin-4-ones were treated with bromine or iodine in AcOH to afford (E)-halomethylidene[1,3]thiazolo[3