Intramolecular Nitrile Imide Cycloadditions onto the Furan Ring: Synthesis of the New 3a,4-Dihydro-6H-difuro[3,2-c;3,4-d]pyrazole Skeleton
Abstract
Intramolecular nitrile imide cycloadditions onto the furan ring have been exploited in the construction of the hitherto unknown 3a,4-dihydro-6H-difuro[3,2-c;3,4-d]pyrazole skeleton.