Methylation of Humic Acid Fractions
- 24 February 1978
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 199 (4331) , 906-907
- https://doi.org/10.1126/science.199.4331.906
Abstract
A new three-step permethylation procedure for humic acid fractions has been developed. In the first step, carboxylic acid groups are methylated with diazomethane in dimethylformamide; in the second step, hydroxyl groups are methylated with methyl iodide and dimethyl sulfinyl carbanion in dimethylformamide; and in the third step, acidic groups hydrolyzed in the earlier steps are methylated with diazomethane. The resulting product is completely soluble in methylene chloride (a high degree of methylation has been achieved).Keywords
This publication has 3 references indexed in Scilit:
- The Chemistry of Fungal Humic Acid‐like Polymers and of Soil Humic AcidsSoil Science Society of America Journal, 1973
- Chemical constitution of coal: 16. Methylation studies on humic acidFuel, 1970
- Methylsulfinyl Carbanion (CH3-SO-CH2-). Formation and Applications to Organic SynthesisJournal of the American Chemical Society, 1965