Synthesis Of Poly Functionalized Tricyclic Nitro Chromenopyrazole Frameworks Via Intramolecular Cycloaddition Reactio Derived From Nitroolefins

Abstract

A simple and novel protocol for the easy synthesis of complex angle-substituted tricyclic frameworks including the IA 3a-nitro2,3 diphenyl-2,3a,4-tetrahydrochromeno[4.3-C]pyrazole ring system. This reaction leads to a new class of merged merges and tetra cycles, creating two new rings, three coherent steer centers and a carbon center that replaces tetras in a unique way. The angle-substituted nitro compounds were highly stereoselectively conserved in high yields