GILBERT, J. C.;SENARATNE, K. P. A., TETRAHEDRON LETT., 1984, 25, N 22, 2303-2306
作者:GILBERT, J. C.、SENARATNE, K. P. A.
DOI:——
日期:——
Modified aza-claisen rearrangement: Generation and isomerization of allyl enammonium salts
作者:John C Gilbert、K.P.A Senaratne
DOI:10.1016/s0040-4039(01)80240-9
日期:1984.1
Base-promoted reaction of ketones and diethyl (diazomethyl)phosphonate in the presence of allylic amines affords allylic enamines in good yields. These enamines undergo [3,3]-sigmatropic rearrangement upon alkylation and heating at 80°C to iminium salts which can be hydrolysed to aldehydes. The procedure allows generation of quaternary carbon centers under mild reaction conditions.