Key points are not available for this paper at this time.
This study demonstrates an abnormal 3+3 tandem Michael addition/N-cyclization of isatin N,N′-cyclic azomethine imine 1,3-dipoles and 2-arylidene malononitrile that diastereoselectively construct a dihydro-pyridazine-based spirooxindole.
Moghaddam et al. (Tue,) studied this question.