A New Synthesis of Model Compounds for the beta-5 Structural Unit in Lignins.

Abstract

Epoxidn. of 1-(4-benzyloxy-3-methoxyphenyl)-3-(2-benzyloxy-3-methyloxyphenyl)-2-propen-1-one [91776-60-2] with H2O2 followed by rearrangement, redn., debenzylation and cyclization gave trans-2,3-dihydro-2-(4-hydroxy-5-methoxyphenyl)-7-methoxy-3-benzo[b]furanmethanol [91776-59-9] as model for phenylcoumarin unit in lignin