Lignin Chromophores, Part IV∗

∗ Part III, see ref.¹

Syntheses of 1,4-Diarylbuta-1,3-dienes∗∗

∗∗ A preliminary report on the results of this work was presented (by N.-O.N.) at the 1981 International Symposium on Wood and Pulping Chemistry, Stockholm, June 9–12, 1981, Preprints Vol. 5, pp. 96-99.

Abstract

Hydroxy- and methoxy-substituted 1,4-diarylbuta-1,3-dienes, models for potential chromophores assumed to be present in residual lignins, have been prepared using Wittig, Knoevenagel and Perkin syntheses.

∗ Part III, see ref.¹

∗∗ A preliminary report on the results of this work was presented (by N.-O.N.) at the 1981 International Symposium on Wood and Pulping Chemistry, Stockholm, June 9–12, 1981, Preprints Vol. 5, pp. 96-99.

∗∗∗ Parts of the present work were carried out (J.G. and A.E.O.) at the Swedish Pulp and Paper Research Institute, Box 5604, S-114 86 Stockholm, Sweden, which is the present address of N.-O. N.

Notes

∗ Part III, see ref.¹

∗∗ A preliminary report on the results of this work was presented (by N.-O.N.) at the 1981 International Symposium on Wood and Pulping Chemistry, Stockholm, June 9–12, 1981, Preprints Vol. 5, pp. 96-99.

∗∗∗ Parts of the present work were carried out (J.G. and A.E.O.) at the Swedish Pulp and Paper Research Institute, Box 5604, S-114 86 Stockholm, Sweden, which is the present address of N.-O. N.