Tetrahedron Letters p. 1259 - 1262 (1981)
Update date:2022-08-11
Topics:
Hori, Mikio
Kataoka, Tadashi
Shimizu, Hiroshi
Imai, Eiji
Matsumoto, Yukiharu
Miura, Iwao
The novel ring transformation reactions were found in the reactions of 1,3,7,9-tetraalkyl-8,9-dihydroxanthines and acetylenic compounds.The reaction of the dihydroxanthine with DMAD gave a propellane type compound and with methyl propiolate afforded the similar type compound and a pyrimido<4,5-b>diazepine derivative.The mechanism of these reactions was also discussed.
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