A phenanthrolinoquinomethane: synthesis and study of precursors
Abstract
Two quinomethane precursors: the ortho-hydroxylated methyl ether 6 and the diacetate 8 have been prepared from [1,3]benzodioxino[5,6-b][1,7]phenanthroline 2. The quinomethane intermediate 4 has been trapped by reduction, nucleophilic addition and [4 + 2] addition with ethyl vinyl ether.