Synthesis and crystal structure determination of model compounds for the dibenzodioxocine structure occurring in wood lignins
作者:Pirkko Karhunen、Petteri Rummakko、Aarne Pajunen、G�sta Brunow
DOI:10.1039/p19960002303
日期:——
Model compounds for the dibenzodioxocine structure, a new structural unit recently discovered in wood lignins, have been synthesised by two different methods. In one route, the 8-membered ring is formed by ring closure of an arylglycerol β-aryl ether with a 5,5′-biphenyl structure in the aryl ether moiety. The other, which gave better yields, involves a biomimetic oxidative phenol coupling. Crystal structures have been obtained for one β-aryl ether and of two dibenzodioxocine isomers, as well as of a product of acid hydrolysis containing a 7-membered ring structure.
最近在木材木质素中发现了一种新的结构单元--二苯并二氧杂环辛结构的模型化合物,该化合物是通过两种不同的方法合成的。一种方法是通过芳基甘油 β 芳基醚的闭环形成 8 元环,芳基醚分子中含有 5,5′-联苯结构。另一种方法涉及仿生物氧化苯酚偶联,产量较高。已获得一种 β 芳基醚和两种二苯并二氧可辛异构体以及一种含有 7 元环结构的酸水解产物的晶体结构。