Helvetica Chimica Acta p. 467 - 471 (1988)
Update date:2022-08-04
Topics:
Pfeuffer, Ludwig
Pindur, Ulf
Depending on the substitution pattern of the 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 ene reaction occurs in addition to the Diels-Alder reaction.
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