Preparation of 1,2-dialkoxyethenes

Details Preparation of 1,2-dialkoxyethenes Preparation of 1,2-dialkoxyethenes

1990-09-11

1992-04-14

Mars, Howard T.

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

Organic compounds

Oxygen containing

568626, 568660, 568669, 568670, C07C 4101

Patent

active

051050226

ABSTRACT:
Dialkoxyethenes of the formula ##STR1## where R.sup.1 to R.sup.4 are identical or different and are each straight-chain or branched alkyl or cycloalkyl or R.sup.2 and R.sup.3 may furthermore be hydrogen, aryl or alkenylaryl, and the aromatic may be substituted by further radicals, such as alkyl, alkoxy or halogens, are prepared by a process in which an alcohol of the formula R.sup.4 OH or R.sup.5 OH is eliminated from a trialkoxyethane of the formula (II) ##STR2## where R.sup.1 to R.sup.4 have the above meanings and R.sup.5 is straight-chain or branched alkyl or cycloalkyl, in the presence of a zeolite and/or a phosphate and/or phosphoric acid or boric acid on a carrier and/or an acidic, untreated metal oxide as a catalyst. Zeolites of the pentasil type are preferably used as catalysts.

REFERENCES:
patent: 2479068 (1949-08-01), Gresham et al.
patent: 3285967 (1966-11-01), Schaeffer
patent: 3739032 (1973-06-01), Wunder
Zwolinski, Journal of Chemical and Engineering Data, vol. 18, 1973, pp. 441-445.
Patent Abstract of Japan, No. 57-185,232, vol. 7 (1983).

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