- EFFECT OF CYCLODEXTRIN ON INTERMOLECULAR PHOTOALKOXYCARBONYLMETHYLATION OF ANISOLE
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The photolyses of anisole (1) and pentyl chloroacetate (2b) in isotropic media produce both alkylation products 3b-5b and dipentyl succinate (6b).In α- and β-CD complexes in aqueous solutions, 6b was absent and the o-alkylation product 3b was predominant.A cage effect and geometric control are attributed to the observed selective product distribution in α- and β-CD complexes in aqueous solutions.
- Bantu, Nageshwer Rao,Kupfer, Rene,Brinker, Udo H.
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- Biomass-derived dibasic acids to diesters with inorganic ligand-supported catalyst: synthesis, optimization, characterization
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Several attempts have been made to obtain aliphatic dicarboxylic diesters from esterification reaction to develop the biomass-derived platform molecules and green manufacturing processes. In this paper, Na3(H2O)6[AlMo6O18(OH)6], an Anderson-type polyoxometalate, firstly, was reported as a catalyst for diester synthesis from dicarboxylic acid to diester which showed an well productivity and selectivity characterized by 1H and 13C. Response surface methodology (RSM) integrated with the desirability function approach was used to determine the best operative conditions, and the optimal reaction parameters for maximum dipropyl succinate yield (77 ± 2.5%) were identified as 1.19?mol.% catalyst loading, 4.9:1 propanol/succinic acid ratio, 113?°C, and 9.6?h. Three batches of tests were carried for catalyst recycling with 78–75% yield even after 6 cycles of esterification. In addition, the substrate carbon chain was increased for investigation of substrate scope achieving satisfactory results and all products were characterized by 1H and 13C nuclear magnetic resonance spectroscopy.
- Lu, Deli,Xu, Yumeng,Chen, Zhe,Han, Sheng
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p. 321 - 337
(2021/08/23)
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- A Mild, Simple, and Convenient Synthesis of Diesters from Malonyl or Succinyl Dichloride and Alcohols Catalyzed by Potassium Tetracarbonylhydridoferrate, KHFe(CO)4, as a New Catalyst
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A large variety of alcohols react with acyl halides of dicarboxylic acids such as malonyl dichloride and succinyl dichloride in the presence of a catalytic amount of tetracarbonylhydridoferrate at room temperature under carbon monoxide or nitrogen to give the corresponding diesters in good yields.
- Shim, Sang Chul,Huh, Keun Tae,Park, Woo Hyun
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