Aldehyde-ethers

Details Aldehyde-ethers Aldehyde-ethers

1980-04-11

1983-05-10

Lone, Werren B.

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

Organic compounds

Oxygen containing

568454, 568497, 568671, C07C 47198

Patent

active

043831257

ABSTRACT:
Aldehyde ethers of the general formula ##STR1## wherein R.sub.1 and R.sub.2 each, independently of the other, represent a C.sub.1 to C.sub.4 alkyl radical, and R.sub.3 and R.sub.4 each, independently of the other, represent a hydrogen atom or a C.sub.1 to C.sub.3 alkyl radical, or wherein R.sub.1 represents a C.sub.1 to C.sub.4 alkyl radical, R.sub.2 and R.sub.3 together with the carbon atoms to which they are attached form a 5-membered or 6-membered cycloaliphatic ring, and R.sub.4 represents a hydrogen atom or a C.sub.1 to C.sub.3 alkyl radical, and wherein Y represents --CH.sub.2 --CH.sub.2 --C.sub.2 or --CH.sub.2 --CH (CH.sub.3)--, are prepared by hydroformylation of a corresponding compound of formula: ##STR2## by reaction with hydrogen and carbon monoxide in the presence of a hydroformylation catalyst, e.g. a rhodium complex catalyst. Preferred compounds include 4-t-butoxybutyraldehyde and 3-t-butoxy-2-methylpropionaldehyde. The compounds are useful chemical intermediates in the production of, for example, butane-1,4-diol, butyrolactone and tetrahydrofuran.

REFERENCES:
patent: 2170854 (1939-08-01), Drake
patent: 2555950 (1942-06-01), Wilson
patent: 3518310 (1970-06-01), Lutz
patent: 3527809 (1970-09-01), Pruett
patent: 3676500 (1972-07-01), Mantell et al.
patent: 3764712 (1972-10-01), Kulka
patent: 4029710 (1977-06-01), Suzuki
Adkins et al., "J. Amer. Chem. Soc.", vol. 71, p. 3051, (1949).
Hill et al., "J. Amer. Chem. Soc.", vol. 77, pp. 3889-3892, (1955).

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