Preparation of substituted benzopinacols

Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy

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568638, 568633, 568637, 568719, 568718, 568640, 568641, B01J 110

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041682181

ABSTRACT:
Benzopinacol compounds can be prepared by an improved process comprising irradiating a diarylketone with UV radiation in a non-polar hydrocarbon solvent mixed with an alcohol. The volume ratio of the non-polar hydrocarbon solvent to alcohol is between 3:1 and 8:1. The benzopinacols are useful, for example, in imaging materials, such as with certain dyes that are reactive with the ketyl radicals that can be released from the benzopinacols upon heating.

REFERENCES:
patent: 3497430 (1970-02-01), French et al.
Filler et al., J. Org. Chem., vol. 40, No. 8, 1975, pp. 1173 to 1175.
Dedinas, J. Am. Chem. Soc., vol. 95, No. 21, pp. 7172 to 7174 (1973).
Schonberg, Preparative Organic Photochemistry, Springer-Verlag, N.Y., N.Y., (1968), pp. 203 to 209.
Dedinas et al., J. Phys. Chem., vol. 76, No. 26, 1972, pp. 3926 to 3933.
Research Disclosure, Oct. 1973, pp. 12 to 13, Item 11409 of DeSelms.

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