Preparation of enol ethers

Details Preparation of enol ethers Preparation of enol ethers

1996-11-22

1998-06-16

Geist, Gary

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

Organic compounds

Oxygen containing

C07C 4128

Patent

active

057673250

ABSTRACT:
A process for the preparation of enol ethers of the general formula I ##STR1## in which R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5 denote C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 alkenyl, or C.sub.7 -C.sub.20 phenylalkyl,
R.sup.2,R.sup.3,R.sup.4 denote hydrogen, aryl, cyano, --COOR.sup.5, C.sub.1 -C.sub.12 alkyl monosubstituted to trisubstituted or interrupted by --COOR.sup.5, --C.dbd.O, cyano, or C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkyl monosubstituted to trisubstituted by --COOR.sup.5, --C.dbd.O, cyano, or C.sub.1 -C.sub.12 alkyl, or C.sub.7 -C.sub.20 phenylalkyl and
R.sup.2 and R.sup.4 or R.sup.3 and R.sup.4 together form a C.sub.3 -C.sub.10 alkylene chain or a C.sub.2 -C.sub.20 alkylidene chain, from acetals or ketals.

REFERENCES:
patent: 1902169 (1933-03-01), Herrmann et al.
patent: 5100852 (1992-03-01), Arntz et al.
Banciu et al, Chem. Abstracts, vol. 94 (19): 156,241f, May 11, 1981, A laboratory method for synthesis of isopropenyl methyl ether, p. 599, col. 2.
Cerveny et al, J. Chem. Tech. Biotechnol., 1993, vol. 58, pp. 212-214, Catalytic Splitting of Alcohols to Unsaturated Ethers.

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