1156464-18-4Relevant academic research and scientific papers
Electrophilic heterocyclization of 6-alken(yn)ylsulfanyl-pyrazolo[3,4-d] pyrimidin-4(5H)-ones
Bentya,Vas'kevich,Bol'but,Vovk,Staninets,Turov,Rusanov
, p. 1362 - 1368 (2008)
6-Allylsulfanyl-1-arylpyrazolo[3,4-d]pyrimidin-4(5H)-ones react with iodine and sulfuric acid to give angular pyrazolothiazolopyrimidine derivatives. The reaction of 6-(prop-2-yn-1-ylsulfanyl)-1-(4-tolyl)-pyrazolo[3,4-d]pyrimidin- 4(5H)-one with sulfuric acid gives angularly fused pyrazolo[4,3-e][1,3]thiazolo- [3,2-a]pyrimidin-4-one, whereas in the reaction with sodium methoxide linearly fused pyrazolo[3,4-d][1,3]-thiazolo[3,2-a]pyrimidin-4-one was formed. Linearly fused pyrazolo[3′,4′:4,5]pyrimido[2,1-b][1,3]thiazole derivatives were also obtained by reaction of 1-aryl-6-(3-phenylprop-2-en-1-ylsulfanyl) pyrazolo[3,4-d]pyrimidin-4(5H)-ones with sulfuric acid.
