Novel cyclizations and ring-opening reactions of 3-phenylindene derivatives

Abstract

Matter and Dykstra 350 mg (94%) of crude product. Trituration with ether gave crystals of 8b which were recrystallized consecutively from acetone-ether, methanol-ether, and petroleum ether (bp 60-80°)acetone to yield colorless crystals: mp 115-117°( lit.17 122°); ir 1680 (w, C=0), 1655 (amide 0=0) cm-1; nmr 1.97-3.0