Abstract
2-Cyano-2-carboximidic acid alkyl ester-oxiranes react with hydrazides and carbazates
to give epoxy acylamidrazones. Some of the last ones are precursors of tetrasubstituted
push-pull alkenes, which in turn can be efficiently converted into 3,5-diaminopyrazoles.
Using ortho -phenylenediamine as nucleophile directly affords 3,4-dihydro-2, 2’-biquinoxalines.
Key words
oxiranes - epoxyacylamidrazones - diaminopyrazoles - biquinoxalines
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Crystallographic data (without structure factors) for the structure reported in this
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