Manufacture of lactones of the triphenylmethane series

Details Manufacture of lactones of the triphenylmethane series Manufacture of lactones of the triphenylmethane series

1976-12-03

1977-10-04

Weinberger, Lorraine A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30794, C09B 1124, C07D30788

Patent

active

040524159

ABSTRACT:
A process for the manufacture of ##STR1## where R and A are identical or different and each is alky of 1 to 4 carbon atoms, by oxidation of ##STR2## with air, oxygen or mixtures thereof, in an acid medium at a pH of from 1.5 to 5.5, at from 30.degree. to 150.degree. C. The reaction takes place rapidly and gives a good yield of the lactone (I), which can be freed from residual (II) by a treatment with alkali. The compound (I) is used as a dye intermediate in no-carbon copying systems.

REFERENCES:
patent: 3185709 (1965-05-01), Munro et al.

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