α-(N,N′-Bisalkoxycarbonyl)hydrazino-α,β-unsaturated ketones are readily prepared via the aza-Baylis-Hillman reaction of alkyl vinyl ketones and azodicarboxylate esters.
REACTION OF PYRIDINIUM YLIDES WITH DIETHYL AZODICARBOXYLATE—A FACILE SYNTHESIS OF Δ<sup>2</sup>-1,3,4-OXADIAZOLINES—
作者:Teruaki Mukaiyama、Kunio Atsumi、Takeshi Takeda
DOI:10.1246/cl.1976.597
日期:1976.6.5
The pyridinium ylides, derived from 1-(2-oxoalkyl)pyridinium salts, reacted with diethylazodicarboxylate to give Δ2-1,3,4-oxadiazolines, which isomerized to α-[N,N′-bis(ethoxycarbonyl)hydrazino]-α,β-unsaturated carbonyl compounds on treatment with acid such as trifluoromethanesulfonic acid.