Preparation of monolignol γ-acetate, γ-p-hydroxycinnamate, and γ-p-hydroxybenzoate conjugates: selective deacylation of phenolic acetates with hydrazine acetate
作者:Yimin Zhu、Matthew Regner、Fachuang Lu、Hoon Kim、Allison Mohammadi、Timothy J. Pearson、John Ralph
DOI:10.1039/c3ra42818d
日期:——
We report here a reliable and facile synthesis of a range of monolignol γ-p-hydroxycinnamate (including p-coumarate, ferulate, and caffeate), γ-acetate, and γ-p-hydroxybenzoate conjugates, many not previously reported, that are either putative intermediates in the biosynthesis of natural lignins or new monomer-conjugates destined for upcoming designer lignins. The key was the development of a highly selective deacylation approach for phenolic acetates; i.e., a method that cleaves phenolic acetates while leaving the sensitive monolignol ester conjugates intact.
我们在这里报告了一种可靠且简便的合成方法,可以合成一系列单酚γ-p-羟基肉桂酸盐(包括p-香豆酸、香豆酸盐和咖啡酸盐)、γ-醋酸盐和γ-p-羟基苯甲酸盐结合物,许多尚未被报道过。这些化合物可能是天然木质素生物合成过程中的中间体,或是即将用于设计木质素的新单体结合物。关键在于开发了一种高选择性的酚酸酯去酰基化方法;即一种能够切割酚酸酯,同时保持敏感的单酚酯结合物不被破坏的方法。