Method for making tertiary butyl esters

Details Method for making tertiary butyl esters Method for making tertiary butyl esters

1988-08-23

1990-05-01

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560117, 560116, 552549, C07C 6976, C07J 0000

Patent

active

049219995

ABSTRACT:
A method is provided for making tertiary butyl esters by effecting reaction between an organic carboxylic acid and isobutylene in the presence of an effective amount of trifluoromethane sulfonic acid at temperatures below about -7.degree. C. Tertiary butyl esters are useful as dissolution inhibitors for novolak resins.

REFERENCES:
Semiconductor International, "Novolac Photoresists for Shorter Wavelengths", O'Brien et al., (1988), pp. 51-52.
McCloskey et al., Organic Synthesis, Coll. vol. IV, (1963), "Di-tert--Butyl Malonate", pp. 261-263.
Greene, Alkyl Esters, "Protective Groups in Organic Synthesis", (1981), pp. 168-169.
J.C.S. Perkin II, R. Roberts, "Kinetics and Mechanism of Addition of Acids to Olefins, Part I, Addition of Acetic Acid to Cyclic and Strained Bicyclic Olefins Catalyzed by Trifluoromethanesulphonic Acid", pp. 1183-1190.
M. J. O'Brien et al., Proceedings of SPIE (1988); Paper 920-06.
J. Org. Chem., Holcombe et al., "A New and Specific Method for the Protection of Phenols as the Corresponding tert-Butyl Ethers", (1986), pp. 111-113.

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