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Abstract
Degradation of arylglycerol-β-aryl ethers, the most important substructure in lignin, by Fusarium solani M-13-1 was investigated. The fungus was shake-cultured in mineral salts media which contained either guaiacylglycerol-β-vanillic acid ether (2), syringylglycerol-β-vanillin ether (4), veratrylglycerolβ-vanillin ether (17) or glycerol-2-vanillic acid ether (9) as sole carbon source. Culture filtrates from incubations with 4 contained syringylglycerolβ-vanillic acid ether (6), 9 and 2,6-dimethoxy-p-benzoquinone (16). Culture filtrates from incubations with 2 also contained 9. Veratrylglycerol-β-vanillic acid ether (18) derived from 17 was not metabolized further. These results inidicate that the alkyl-aryl C-C bond in both 2 and 5 was cleaved by phenol oxidizing enzymes with formation of 9 and methoxy-p-benzoquinone (15 and 16). Compound 9 was converted to glycerol-2-vanillic acid ether monoacetate (10), glyceric acid-2-vanillic acid ether (11) and ethylene glycol monovanillic acid ether (12).
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