New Rearrangement of Conjugated Cyclic Ene Nitroso O-Trimethylsilyl Acetals: Convenient Synthesis of Dihydro-2H-pyran-3-one and Dihydrofuran-3-one Oximes
The nucleophile-induced rearrangement of cyclic N-alkoxy-N-(silyloxy)enamines was investigated. As a result, a new strategy for the synthesis of β-pyranone and β-furanone derivatives from nitrocompounds is suggested. nitroso acetals - rearrangement - nitrogen heterocycles - 1,2-oxazines - aliphatic nitrocompounds