Rh-catalyzed (4+1)-annulation of N-arylpyrazolidinones with MBH adducts has been developed to furnish α-pyrazolo1,2-aindazole acrylates. The use of MBH adduct as C1-synthon, cascade C-C/C-N bond formation, air as the oxidant, substrate...
Verma et al. (Thu,) studied this question.