Enamine chemistry. Part XI. Reaction of αβ-unsaturated acids and acid chlorides with imines. Synthesis of 2-oxotetrahydropyridines and 2-oxo-octahydroquinolines
作者:P. W. Hickmott、G. Sheppard
DOI:10.1039/j39710001358
日期:——
2-Oxotetrahydropyridines and 2-oxo-octahydroquinolines have been isolated from the reaction of acryloyl chloride with imines, together with the enamide and, in some cases, the amide. Crotonoyl and cinnamoyl chlorides give mixtures consisting mainly of the enamides. 2-Oxotetrahydropyridines and 2-oxo-octahydroquinolines have also been isolated from the reaction of acrylic acid with imines. The mechanisms
Regioselectivity of enamine reactions, preferential 2,2-disubstitution of 2-methylcyclohexanone imines
作者:Peter W. Hickmott、Bruce Rae
DOI:10.1016/s0040-4039(00)98841-5
日期:1985.1
Secondary enamines derived from imines of unsymmetrical α-substituted ketones react with electrophilic alkenes at the more substituted position to give α,α-disubstituted ketones on hydrolysis.
Stereochemistry of theRobinson Anellation: Studies on the Mode of Formation of the Intermediate Hydroxy Ketones
作者:Cornelius Nussbaumer
DOI:10.1002/hlca.19900730607
日期:1990.9.19
stereochemical outcome of the base-catalyzed cyclization of diketones 5–8 has been investigated under protic conditions (Scheme 3). The more stable trans-fused ketols are preferentially formed in kinetically controlled aldol reactions, when the incipient angular substituent R = H (6 10a) or CN (7 11a, 8a 12a). For R = Me (as in 5), axial attack of the side-chain enolate doublebond on the ring CO group results