Preparation of 2H‐spiro[benzo[d]isothiazole‐3,3′‐pyrazole]‐1, 1‐dioxide‐2′(4′H)‐carboxylates from dilithiated C(α),N‐carboalkoxyhydrazones and methyl 2‐(aminosulfonyl)benzoate
1. Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424;2. Department of Chemistry, Clemson University, Clemson, South Carolina 29634