- Method of producing dicarboxylic acids
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A method of producing dicarboxylic acids (e.g., α,ω dicarboxylic acids) by reacting a compound having a terminal COOH (e.g., unsaturated fatty acid such as oleic acid) and containing at least one carbon-carbon double bond with a second generation Grubbs catalyst in the absence of solvent to produce dicarboxylic acids. The method is conducted in an inert atmosphere (e.g., argon, nitrogen). The process also works well with mixed unsaturated fatty acids obtained from soybean, rapeseed, tall, and linseed oils.
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Page/Page column 13; 19
(2009/05/29)
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- PREPARATION OF TERMINAL ALKENIC ESTERS BY AN OXIDATIVE RADICAL REACTION
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A general method is described for the conversion of (mono)alkenic esters with the double bond at the nth C atom to terminal alkenic esters of (n-1) C atoms in length, with the double bond at n-2.Ozonolysis, either in methanol or in light petroleum, is followed by reaction with a mixture of ferrous and cupric salts.Methyl 10-undecenoate, methyl oleate (methyl (Z)-9-octadecenoate) and methyl erucate (methyl (Z)-13-docosenoate) were converted to methyl 8-nonenoate, methyl 7-ocotenoate and methyl 11-dodecenoate respectively.An improved preparation of 5-hexenoic acid is also described.
- Cardinale, G.,Laan, J. A. M.,Ward, J. P.
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p. 2899 - 2902
(2007/10/02)
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