17351-22-3Relevant articles and documents
Methods for preparing 1,2-cyclohexanedicarboxylate or phthalic acid ester
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, (2019/05/02)
The invention relates to methods for preparing a plasticizer 1,2-cyclohexanedicarboxylate and phthalic acid ester by a biomass route. The preparation method of 1,2-cyclohexanedicarboxylate comprises the following steps: 1. crotonaldehyde, formaldehyde and fumarate (or maleate) are subjected to a D-A cycloaddition reaction under the catalysis of organic base so as to generate diester-substituted cyclohexenecarboxaldehyde; 2. the product is subjected to decarbonylation under a transition metal catalyst to generate cyclohexenedicarboxylate; and 3. cyclohexenedicarboxylate undergoes hydrogenationof a double bond under a transition metal catalyst to generate 1,2-cyclohexanedicarboxylate. The preparation method of phthalic acid ester comprises the following steps: 1. crotonaldehyde, formaldehyde and fumarate (or maleate) are subjected to a D-A cycloaddition reaction under the catalysis of organic base so as to generate diester-substituted cyclohexenecarboxaldehyde; and 2. the product undergoes decarbonylation/aromatization under a transition metal catalyst to generate phthalic acid ester.
Synthesis of 1,4-Cyclohexanedimethanol, 1,4-Cyclohexanedicarboxylic Acid and 1,2-Cyclohexanedicarboxylates from Formaldehyde, Crotonaldehyde and Acrylate/Fumarate
Hu, Yancheng,Zhao, Zhitong,Liu, Yanting,Li, Guangyi,Wang, Aiqin,Cong, Yu,Zhang, Tao,Wang, Feng,Li, Ning
supporting information, p. 6901 - 6905 (2018/06/04)
Valuable polyester monomers and plasticizers—1,4-cyclohexanedimethanol (CHDM), 1,4-cyclohexanedicarboxylic acid (CHDA), and 1,2-cyclohexanedicarboxylates—have been prepared by a new strategy. The synthetic processes involve a proline-catalyzed formal [3+1+2] cycloaddition of formaldehyde, crotonaldehyde, and acrylate (or fumarate). CHDM is produced after a subsequent hydrogenation step over a commercially available Cu/Zn/Al catalyst and a one-pot hydrogenation/oxidation/hydrolysis process yields CHDA, whereas 1,2-cyclohexanedicarboxylate is obtained by a Pd/C-catalyzed tandem decarbonylation/hydrogenation step.
PROCESS FOR HYDROGENATION OF POLYCARBOXYLIC ACIDS OR DERIVATIVES THEROF
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Paragraph 0041; 0042; 0043, (2013/06/27)
The disclosure provides a process for hydrogenation of polycarboxylic acids or derivatives thereof, including: hydrogenation of polycarboxylic acids or derivatives thereof in the presence of a catalyst, wherein the catalyst includes an active metal and a