201420-10-2

Upstream product

• 100-46-9 benzylamine 
• 201420-09-9 3-amino-2-methylmercapto-5,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-one 
• 4815-24-1 2-amino-4,5-dimethyl-3-thiophenecarboxylic acid ethyl ester 
• 170244-01-6 3-Amino-2,3-dihydro-5,6-dimethyl-2-thioxo-thieno<2,3-d>pyrimidin-4(1H)-one 
• 201420-08-8 methyl N-(3-carbethoxy-4,5-dimethylthienyl)dithiocarbamate 

Relevant academic research and scientific papers

Synthesis of novel 1,2-disubstituted-6,7-dimethyl-1H,5H-thieno[2,3-d]-[1,2,4]triazolo[1,5-a] pyrimidin-5-ones

A facile and simple synthesis for 3-amino-2-thioxo-5,6-dimethyl-l,2,3,4-tetrahydrothieno[2,3-d]pyrimidin-4(3H)-one 3a is described and from this precursor, a series of hitherto unreported linear 1,2-disubstituted-6,7-dimethyl-[1H,5H]-thieno[2,3-d] [l,2,4]triazolo[l,5-a]pyrimidin-5-ones 6a-o have been synthesised by the cyclocondensation of the corresponding 2,3-diamino-5,6-dimethyIthieno[2,3-d]pyrimidin-4(3H)-ones 5a,b with various one carbon donors.