ARYL MIGRATIONS DURING PULPING

被引：8

作者：

GIERER, J

机构：

[1] Royal Institute of Technology, Division of Wood Chemistry, S-100 44, Stockholm

来源：

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY | 1992年 / 12卷 / 04期

关键词：

D O I：

10.1080/02773819208545787

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Aryl migrations taking place during pulping processes are described. Migrations from C(alpha) to C(beta) are given by "condensed" beta-O-4 units and result in fragmentation and the formation of potential chromophoric systems of the stilbene type. Migrations from C(beta) to C(alpha), on the other hand, are observed with stilbenoid units and their precursors (beta-1 and beta-5 units) and afford 1,1-diaryl-2-oxo structures. Both types of aryl migration proceed via 3-membered spiro-cyclohexadienone intermediates. The direction of the aryl migrations may affect the ease and extent of lignin fragmentation and the formation of potential chromophoric groups during pulping processes.

引用

页码：367 / 386

页数：20

共 16 条

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[12]

GIERER J, 1965, ACTA CHEM SCAND, V19, P11003

[13]

KARLSSON O, 1990, 1ST EUR WORKSH LIGN, P3

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