ChemInform Abstract: An Efficient, Three‐Component Synthesis and Molecular Structure of Derivatives of 2‐Amino‐3‐R‐6‐ethyl‐4,6‐dihydropyrano[3,2‐c] [2,1]benzothiazine‐5,5‐dioxide Spirocombined with a 2‐Oxindole Nucleus.

Abstract

AbstractUsing corresponding Knoevenagel adducts from methylene‐active components (III) or (V) and isatin (II) as starting materials, spiro compounds (IV) and (VI) are formed in lower yields under similar conditions.