- Preparation method for 1,4-cyclohexane dicarboxylic acid (CHDA) and diester thereof
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The invention discloses a preparation method for 1,4-cyclohexane diformic acid (CHDA) and diester thereof. In particular, 2-cyclohexene-1,4-dicarboxylic acid is subjected to catalytic hydrogenation to prepare the CHDA or CHDA diester under the effect of a
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Paragraph 0046; 0047; 0048; 0049; 0050
(2017/04/25)
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- A process for preparing 1,4-cyclohexane dicarboxylic acid diester method
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A new method for preparing 1,4-cyclohexane dioctyl phthalate diester. The method comprises: using a succinate diester as a material, obtaining succinyl succinate diester by means of ester condensation, and hydrogenating and dehydrating the succinyl succinate diester to obtain 1,4-cyclohexane dioctyl phthalate diester. The present invention provides a new way for preparing 1,4-cyclohexane dioctyl phthalate diester, and has a very important development potential and a broad application perspective.
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Paragraph 0026 - 0031
(2017/01/12)
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- Stereochemistry of Decarbalkoxylation of Cyclic Geminal Diesters Effected by Water and Lithium Chloride in Me2SO
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The stereochemical consequences of the decarbalkoxylation of cyclic geminal diesters by LiCl-H2O-Me2SO have been examined.The norbornene diester 13 and the norbornane diester 16 lead predominantly to the exoesters 14 and 17, respectively.The 2-methylcyclohexane diester 22 leads to esters containing more cis (23) than trans (24) isomer.The diesters 19,25, and 28 lead to nearly equal amounts of the cis and trans esters.In these latter cases,the enolates generated from the esters (via LDA) are protonated in a nonstereoselective fashion on quenching with water.This is suggestive of an enolate intermediate in the decarbalkoxylation reaction.The implications of these sterochemical results are discussed.
- Krapcho, A. Paul,Weimaster, John F.
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p. 4105 - 4111
(2007/10/02)
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