Heterocycles p. 655 - 658 (1991)
Update date:2022-08-03
Topics:
Miki, Yasuyoshi
Hachiken, Hiroko
Yoshikawa, Masami
Takemura, Shoji
Ikeda, Masazumi
Treatment of 2,3-dihydro-2-methyl-3-phenyl-1H-pyrazino<3,4,5-cd>indolizine 2-oxides (5) with trifluoroacetic anhydride gave new heterocyclic six-membered betaines (6) which underwent 1,3-dipolar cycloaddition reaction with dimethyl acetylenedicarboxylate
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