Base-catalyzed dehydration of substituted cis-1,2-dihydroxycyclo

Details Base-catalyzed dehydration of substituted cis-1,2-dihydroxycyclo Base-catalyzed dehydration of substituted cis-1,2-dihydroxycyclo

1990-12-07

1992-03-03

Gray, Bruce

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

Organic compounds

Nitriles

568747, 568780, C07C25500

Patent

active

050935143

ABSTRACT:
A process for dehydrating compounds of the formula ##STR1## where --R is --CH.dbd.CH.sub.2, --C.tbd.CH --C.tbd.N or ##STR2## in an aqueous solution thereof is disclosed. In the case where R is --CH.dbd.CH.sub.2 or --C.dbd.CH, the temperature is preferably at least 50.degree. C. and preferably 75.degree. to 100.degree. C. The base is at least 0.1N and preferably 1.0 to 8N. Preferred bases are NaOH, KOH and C.sub.5 OH. In the case where --R is C.tbd.N, the temperature preferably is 20.degree. to 50.degree. C.

REFERENCES:
patent: 4590304 (1986-05-01), Wallace et al.
Wessely et al., Chemical Abstracts, vol. 54, No. 2229b (1960).

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