Synthèse de γ-lactames et de perhydro-1,2-pyridazin-3-ones polyfonctionnels.
摘要:
Direct condensation, in methanol, of primary amines on 2-(1-carbethoxy-1-hydroxyethyl)acrylonitrile yielded to alpha and beta-functionalized gamma-lactames 6(a-f). The same reaction with hydrazines gave perhydro-1,2-pyridazin-3-ones 7 and 8 when nitrogen is not dialkylated.
A Facile One-Pot Transformation of Baylis-Hillman Adducts into Unsymmetrical Disubstituted Maleimide and Maleic Anhydride Frameworks: A Facile Synthesis of Himanimide A
Unsymmetrical, disubstitutedmaleimide and maleicanhydrideframeworks have been accessed from Baylis–Hillmanadducts in an operationally simple three‐step (Friedel–Crafts reaction, selective hydrolysis, and cyclization), one‐pot strategy. This strategy has been successfully extended to the synthesis of a representative bioactive compound, himanimide A (see scheme).