New Reactions of 3-Vinyl- and 3-(2-Propenyl)Indoles withN-Phenylmaleimide: [4 + 2] Cycloaddition, ene reaction, and dimerization
作者:Ludwig Pfeuffer、Ulf Pindur
DOI:10.1002/hlca.19880710220
日期:1988.3.16
aminobutadiene subunit in the selected 3-vinylindoles 1, 3, 6, and 9, stereospecific [4 + 2] cycloadditions (‘endo’-preference) and dimerizations take place on reaction with N-phenylmaleimide. In the reaction of 9 with N-phenylmaleimide in the absence of a Lewis-acid catalyst, a competing enereaction occurs in addition to the Diels-Alder reaction.