Process for the production of cyclic esters of undecanedioic aci

Details Process for the production of cyclic esters of undecanedioic aci Process for the production of cyclic esters of undecanedioic aci

1978-02-28

1979-01-23

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D32100

Patent

active

041360982

ABSTRACT:
A process for the production of cyclic esters of undecanedioic acid with aliphatic diols comprising thermolyzing the corresponding linear polyesters derived from said acid and said diols under reduced pressure at temperatures of 200.degree.-300.degree. C in the presence of organotin and phosphonate catalysts, wherein the organotin catalyst is of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl each of 6-36 carbon atoms, and the phosphonate is O,O-dialkyl-(3,5-di-tert-butyl-4-hydroxybenzyl)-phosphonate, the alkyl groups of which each contain 2-18 carbon atoms.

REFERENCES:
patent: 2020298 (1935-11-01), Carothers et al.
patent: 2936310 (1960-05-01), Beets et al.
Hill et al., Jour. American Chemical Soc., 55, 5031-5039, 1933.
Yasukawa et al., Chem. Abstracts, vol. 78, 1973, 158966q and 158968s.

Affiliated with

Also associated with

Rating

Process for the production of cyclic esters of undecanedioic aci 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 the production of cyclic esters of undecanedioic aci, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of cyclic esters of undecanedioic aci will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2272592