- Carboxylic acid production of tertiary butyl
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PROBLEM TO BE SOLVED: To provide a process for producing a carboxylic acid tert-butyl ester industrially advantageously.SOLUTION: The process for producing a carboxylic acid tert-butyl ester includes reacting compounds represented by formula (1) and formula (2) (wherein Y denotes a 1-20C alkoxy group) with isobutene in the presence of an acid catalyst and at normal pressure by using a mixed solvent containing an aromatic hydrocarbon.
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Paragraph 0063; 0065; 0073
(2016/12/22)
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- Mild and efficient method for preparation of tert-butyl esters
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Aliphatic and aromatic methyl esters undergo efficient transesterification at ambient temperature with potassium tert-butoxide in diethyl ether.
- Vasin,Razin
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p. 658 - 660
(2007/10/03)
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- A New Acylation Catalyst
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Cobalt(II) chloride catalyses the acylation of alcohols and amines with anhydrides in excellent yields.
- Ahmad, Saeed,Iqbal, Javed
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p. 114 - 115
(2007/10/02)
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- Alkynes and Cumulenes, XII. The Application of Di-tert-butyl Acetylenedicarboxylate in Diels-Alder Additions
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Di-tert-butyl acetylenedicarboxylate (1) may be added in good yields to the model dienes 1,3-butadiene (6a), 2-methyl-1,3-butadiene (6b), 2,3-dimethyl-1,3-butadiene (6c), furan (10), and 1,3-cyclohexadiene (19) to afford the Diels-Alder adducts 7a-c, 12 (E = CO2C(CH3)3), and 20, respectively.Under certain conditions the reaction with 10 also laeds to the four 2:1-adducts 13-16 (E = CO2C(CH3)3).Whereas the esters 7a-c are converted in quantitative yields to the corresponding anhydrides 8a-c by warming in the presence of catalytic amounts of p-toluenesulfonic acid or by heating in substance, the decomposition of 12 and 20 stops at the stage of the monoesters 17 and 21, respectively.Competition experiments show that 1 is approximately three times less reactive towards 6c than dimethyl acetylenedicarboxylate (11).It is shown that 1 is a useful dienophile for the preparation of "mixed" paracyclophanes of type 28.
- Weber, Gisela,Menke, Klaus,Hopf, Henning
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p. 531 - 541
(2007/10/02)
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