Detail of "2680-81-1"

Reference

Effect of amines on the conversion of lignin and model compounds in alkaline media

Effect of amines on the conversion of lignin and model compounds in alkaline media. Chupka, E. I.; Burlakov, V. M. (Sib. Nauchno-Issled. Inst. Tsellyul. Kartona, USSR). Khim. Drev., (4), 62-6 (Russian) 1977. CODEN: KHDRDQ. DOCUMENT TYPE: Journal CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) The accelerating influence of amines on the delignification process is attributed to an inhibition of processes leading to increased mol. wt. of the lignin during alk. treatment. Addn. of 10% monoethanolamine (I) [141-43-5] soln. in NaOH inhibited the oxidative degrdn. of dehydrodiisoeugenol (II) [2680-81-1], dehydrodihydrodiisoeugenol (III) [4731-87-7], or p-hydroxyphenyl-1-propanone .beta.-guaiacyl ether (IV) [64608-91-9] (lignin model compds.) during alk. cooking. The degree of conversion of lignin [9005-53-2] to low-mol.-wt. monomers and dimers increased only by .apprx.5% on addn. of I during alk. cooking. The changes occurring in the lignin model compds. were confirmed by UV spectroscopy.

Composition of acids of the oxidative ammonolysis of model compounds and lignin preparations under wood delignification conditions

Composition of acids of the oxidative ammonolysis of model compounds and lignin preparations under wood delignification conditions. Fedulina, T. G.; Sultanov, V. S.; Zarubin, M. Ya. (Leningr. Lesotekh. Inst., Leningrad, USSR). Khim. Drev., (1), 55-61 (Russian) 1984. CODEN: KHDRDQ. DOCUMENT TYPE: Journal CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Section cross-reference(s): 80 The compn. of carboxylic acids obtained by ammoxidn. of lignin (I) [9005-53-2] model compds., e.g., PhOH [108-95-2], guaiacol [90-05-1], veratrol [91-16-7], vanillin [121-33-5], isoeugenol [97-54-1], a-guaiacyl propanone [2503-46-0], a-guaiacypropanol [20736-21-4], a-veratrylpropanone g-guaiacyl ether [89162-46-9], a-veratrylpropanol g-guaiacyl ether [89319-40-4], dehydrodiisoeugenol [2680-81-1], diisoeugenol [522-09-8], dioxane lignin [8068-03-9], and Bjorkman lignin [8068-00-6] was detn. by gas-liq. chromatog. In all, 28 carboxylic acids were identified. The ammoxidn. of all I model compds. gave glycolic acid [79-14-1], oxalic acid [144-62-7], and malonic acid [141-82-2].In this experiment, several chemicals are used like 110-15-6 and 110-94-1 A probable ammoxidn. mechanism of I model compds. was proposed. .