1416209-39-6Relevant articles and documents
Condensed sulfur-containing pyridine systems 3.*Construction of penta- and hexacyclic heterocyclic systems by the cascade reaction of 3-cyanopyridine-2(1H)-thiones and 3-cyano-pyridine-2(1H)-thiolates with 8-chloromethyl-3-methyl-7-(2-oxo-2-phenylethyl)xanthene
Dotsenko,Sventukh,Krivokolysko
, p. 1397 - 1409 (2013/04/24)
The alkylation of 3-cyanopyridine-2(1H)-thiones with 8-chloromethyl-3- methyl-7-(2-oxo-2-phenylethyl)- xanthene in a KOH-H2O-DMF system upon heating leads to the formation of pyrido-[3″,2″:4′,5′] thieno[3′,2′:5,6][1,4]diazepino[7,1-f]purine-2,4(3H,6H)-dione derivatives in good yields. Under milder conditions, the intermediates of the cascade reactions, namely, 2-({[3-methyl-2,6-dioxo-7-(2-oxo-2-phenylethyl)-2,3, 6,7-tetrahydro-1H-purin-8-yl]methyl}thio)pyridine-3-carbonitriles, can be isolated and characterized.