Diels-Alder reactions of 2-azadienes derived from cysteine and serine methyl esters and aldehydes
作者:Thomas L. Gilchrist、António M. d'A. Rocha^Gonsalves、Teresa M.V.D. Pinbo^Melo
DOI:10.1016/s0040-4020(01)85683-0
日期:1994.1
The Diels-Alderreactions of N-benzylidenedehydroalanine methyl ester 1a with but-3-en-2-one and with other electron deficient dienophiles have been found to give new dihydro- and tetrahydropyridines. The cycloaddition reactions are regioselective but not stereoselective. Cycloaddition reactions between 1a and enamines have also been observed. The [4 + 2] cycloaddition reactions of other N-arylidenedehydroalanine