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Report | Regular issue | Vol 23, No. 9, 1985, pp.2317-2319
Published online, 1st January, 1970
DOI: 10.3987/R-1985-09-2317
A New Contraction of Pteridine 5-Oxides to Purines and a 7-Deazapurine by the 1,3-Dipolar Cycloaddition Reaction

Misuzu Ichiba, Hashime Kanazawa, Zenzo Tamura, and Keitaro Senga*

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


The 1,3-dipolar cycloaddition reaction of pteridine 5-oxides with dimethyl acetylenedicarboxylate resulted in a new ring contraction of the pyrazine moiety to give purines and a 7-deazapurine.