Process for the preparation of 3-phenoxy-benzaldehydes

Details Process for the preparation of 3-phenoxy-benzaldehydes Process for the preparation of 3-phenoxy-benzaldehydes

1979-10-29

1981-06-23

Mars, Howard T.

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

Organic compounds

Oxygen containing

568442, 568637, 568638, C07C 4500, C07C 4529

Patent

active

042752418

ABSTRACT:
A process for the preparation of a-phenoxy-benzaldehyde which comprises contacting the 3-phenoxy-benzyl alcohol of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent hydrogen or halogen with an aqueous solution of a dichromate in the presence of aqueous sulphuric acid at a temperature in the range of 50.degree. to 125.degree. C. The 3-phenoxy-benzaldehyde can be in a mixture of other organic compounds such as obtained by hydrolyzing a 3-phenoxy toluene chlorinated in the side chain at a temperature of 140.degree.-210.degree. C. under pressure.

REFERENCES:
patent: 3100796 (1963-08-01), Trapp et al.
patent: 3236898 (1966-02-01), Green et al.
patent: 3322833 (1967-05-01), McNelis
patent: 4108904 (1978-08-01), Brown et al.
patent: 4134925 (1979-01-01), Petersen et al.
Houben-Weyl, Methoden der Organischen Chemie, George Thieme Verby, Struttgart, 1954, 7/1, pp. 171-174.
Wiberg, Oxidation in Org. Chem. Part A, Academic Press, New York, 1965, pp. 145, 146, 151.
Halasz, Soc. Chem. France, Bull. [5] 8, 1941, pp. 170-172, 175-176, 183-185.

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