Diels-Alder reaction of diactivated dissymetrical cyclopropenes
Written by sctunisie no commentsThe addition (4 + 2) of cyclopropenes derived, by photolisis, from pyrazolenines having in position C4 and C5 electroattractive substitutes, is easily achieved on dienes-1,3. They are concerted reactions which are sensitive to steric effects; the Diels-Alder products obtained in this way therefore present a great stereoselectivity.
A. Khemiss, M. Franck-Neumann
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