Process for the preparation of di-tert-butyl succinate

Details Process for the preparation of di-tert-butyl succinate Process for the preparation of di-tert-butyl succinate

1998-04-15

1999-06-22

Medley, Margaret

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560190, C07C 6934

Patent

active

059144262

ABSTRACT:
A process for the preparation of di-tert-butyl succinate of formula ##STR1## by proton-catalysed esterification of succinic acid with isobutene, which comprises reacting succinic acid or succinic acid anhydride, or mixtures thereof, with isobutene in the presence of a water-containing acid esterification catalyst, with the proviso that sulfuric acid is used in a concentration of not more than 95% by weight.
By this process it is possible to prepare di-tert-butyl succinate by reacting succinic acid or succinic acid anhydride, or corresponding mixtures of succinic acid and succinic acid anhydride, with isobutene butene with reduced evolution of heat and at the same time with increased yield and improved purity of the end product.

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Hackh's Chemical Dictionary, 4th Ed., Grant et al, Mc-Graw-Hill Book Company, 1969, p. 648.
Slavka Pavlov et al, Bulletin de la Societe Chimique de France, No. 12, Dec. 1974, pp. 2985-2986.

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