Lignin–feruloyl ester cross-links in grasses. Part 2. Model compound syntheses
作者:John Ralph、Richard F. Helm、Stéphane Quideau
DOI:10.1039/p19920002971
日期:——
single geometrical isomer was produced. Synthesis of both isomers of derived compounds and detailed NMR analysis indicated that this was the expected Z-isomer. A model for β-5 coupled products, 3-[3-carboxy-2-(4-hydroxy-3-methoxyphenyl)-7-methoxy-2,3-dihydrobenzofuran-5-yl]acrylic acid bis(methyl 5-deoxy-α-L-arabinofuranosid-5-yl) ester, was obtained as a cis/trans mixture in 55% yield by radical coupling