[4+2] Cycloaddition reaction: Synthesis of 7,9-diaryl-1,3,5-trimethyl- 2,4,8-trioxohexahydro-9H -pyrimido[2,1-g ]purine derivatives

Synthetic Organic Chemistry Division, Regional Research Laboratory, Jorhat-785 006, Assam, India

E-mail : drbngoswami@yahoo.com

Manuscript received 22 February 2006, accepted 23 May 2006

(4+2] Cycloaddition reaction between 8-arylidineaminocaffiene and aryl ketene or chloro keten generated \(in\) \(situ\) from aryl acetyl chloride or chloro acetyl chloride and triethylamine) formed 7,9-diaryl-1,3,5-trimethyl·2,4,8-trioxohexahydro- 9Hpyrimido[ 2,1.g ]purine in dioxane solvent is described.