I. Arrastia et al., THEORETICAL AND EXPERIMENTAL STUDIES ON THE PERISELECTIVITY OF THE CYCLOADDITION REACTION BETWEEN ACTIVATED KETENES AND CONJUGATED IMINES, Tetrahedron letters, 35(42), 1994, pp. 7825-7828
Theoretical and experimental studies on the cycloaddition between meth
oxyketene and a model conjugated imine predict the preferential format
ion of the [2+2] cycloadduct. A configuration interaction level of the
ory is required to reproduce correctly the observed periselectivity.