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Communication | Regular issue | Vol 9, No. 7, 1978, pp.793-795
Published online, 1st January, 1970
DOI: 10.3987/R-1978-07-0793
The 1,3-Dipolar Cycloaddition Reaction of Fervenulin 4-Oxides with Dimethyl Acetylenedicarboxylate, a Novel Synthesis of Pyrrolo[3,2-d]pyrimidines (9-Deazapurines)

Keitaro Senga,* Misuzu Ichiba, and Sadao Nishigaki

*Pharmaceutical Institute, School of Medicine, Keio University, Shinanomachi 35, Shinjuku, Tokyo 160-0016, Japan

Abstract

The 1,3-dipolar cycloaddition reaction of fervenulin 4- oxides (6,8-dimethylpyrimido[5,4-e]-as-triazine-5,7(6H, 8H)-dione 4-oxides) with dimethyl acetylenedicarboxylate afforded the corresponding 7-carbomethoxy-l,3-dimethylpyrrolo[3,2-d]pyrimidine-2,4(1H,3H)-diones.