Trivinylcyclohexane stereoisomeric compositions and methods for preparing same

摘要

Disclosed herein is a process for making 1,2,4-trivinylcyclohexane that is enriched in a particular geometric isomer. The process involves the thermal isomerization of 1,5,9-cyclododecatriene at temperature between 400° C. and 600° C. followed by an equilibration of the resultant intermediate in either the gas phase or liquid phase at temperature between 180° C. and 375° C. and at pressures ranging from 0.101 kPa to 1,013 kPa. Also disclosed are 1,2,4-trivinylcyclohexane compositions that are enriched in a particular geometric isomer.

主权项

1. A process for preparing a 1,2,4-trivinylcyclohexane composition enriched in Isomer A—1,trans-2,trans-4-trivinyl-cyclohexane, the lowest boiling geometric isomer of 1,2,3-trivinylcyclohexane—having the three-dimensional structure ofcomprising:
(i) heating 1,5,9-cyclododecatriene at a temperature of from about 400° C. to about 600° C. and at a pressure of from about 1 mbar to about 1.2 bar thereby forming a 1,2,4-trivinylcyclohexane composition containing low levels of Isomer A; and (ii) subsequently equilibrating the composition from step (i) in a vapor phase or a liquid phase at a temperature ranging from about 180° C. to about 375° C. and at a pressure ranging from about 1 mbar to about 10 bar to produce a 1,2,4-trivinylcyclohexane composition enriched in Isomer A as compared to the composition of step (i).