Process for preparation of thioethers

Details Process for preparation of thioethers Process for preparation of thioethers

1978-08-28

1980-11-04

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604651, 26034674, 560152, 560154, 564192, C07C12000, C07C12116, C07C12120, C07C14920

Patent

active

042319560

ABSTRACT:
The process of preparing thioethers by reacting aliphatic thioalcohols, e.g., mercaptans, including hydrogen sulfide with activated, alpha, beta unsaturated compounds ##STR1## capable of participating in the Michael Addition Rection* in which X is a suitable electron withdrawing group. The Addition, which is carried out in the presence of a catalytic base is greatly improved with respect to minimizing formation of side products by utilizing a specially selected catalyst comprising one or more cyclic tertiary nitrogen compounds having an excellent balance between reactivity and selectivity. The preparation of thioethers from acrylic acid derivatives especially esters (CH.sub.2 .dbd.CH--COOR', R'=C.sub.1 --C.sub.8) is preferred. The preparation of the dimethyl ester of 3,3'-thiodipropionic acid to result in dimethylthiodipropionate of relatively high purity is especially preferred.

REFERENCES:
patent: 2163176 (1939-06-01), Keyssner
patent: 2268185 (1941-12-01), Burke et al.
patent: 2416052 (1947-02-01), Gribbins
patent: 3194830 (1965-07-01), Dann et al.
patent: 3502708 (1970-03-01), Thoma et al.
patent: 4052440 (1977-10-01), Gladstone et al.

Affiliated with

Also associated with

Rating

Process for preparation of thioethers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparation of thioethers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparation of thioethers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1644875