Method for producing alkyl-substituted butenols
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United States of America Patent
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Jan 30, 2007
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N/A
app pub date -
Sep 8, 2000
filing date -
Sep 17, 1999
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Abstract
Alkyl-substituted butenols having the formula (I): R.sup.1--CH.sub.2--CH.dbd.CR.sup.2--CH.sub.2OH (I) wherein R.sup.1 is a saturated or olefinically unsaturated alkyl or cycloalkyl group having from 4 to 16 carbon atoms and wherein R.sup.1 is optionally substituted by an alkyl, cycloalkyl, aryl or alkaryl having up to 12 carbon atoms; R.sup.2 is hydrogen or an alkyl group having from 1 to about 6 carbon atoms are produced by a process which comprises: (1) reacting an aldehyde of the formula (II): R.sup.1--CH.sub.2--CHO (II) wherein R.sup.1 has the same meaning as in formula (I), with the corresponding lower aldehyde to form an unsaturated aldehyde in an inert organic solvent; (2) continuously contacting an optionally calcined copper/zinc catalyst with the unsaturated aldehyde under isothermal conditions at temperatures of from about 45 to about 60.degree. C. and under a hydrogen pressure of from 1 to about 300 bar.
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