Synthesis of the Aglycones of Poriolide and Isoporiolide, New Biphenyl-type Flavanones

Abstract

A key point of the synthesis of aglycones (12 and 33) derived from poriolide (1) and isoporiolide (2), the toxic constituents of Leucothoe keiskei, is the construction of the unsymmetric biphenyl compounds, this point was effected by application of the rearrangement reaction of suitable phenyltropone derivatives to biphenyl compounds.