Patent · US Expired

Method for determining the enantiomer ratio trimethylcyclopentene derivatives

US7537933B2 · kind B2 · utility

0Cited by

6References

12Claims

0Family size

Assignee

KAO CORPORATION · JP

Inventors

Thomas Markert · Monheim, DE
Armin Mosandl · Dettelbach, DE
Steffi Bilke · Ratingen, DE

Key dates

Filing date	Sep 3, 2002
Grant date	May 26, 2009
Priority date	—
Expiry date	Jan 12, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T436/21
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for determining the enantiomer ratio of trimethylcyclopentene derivatives of structure (I), wherein Z is an alkyl radical having 1-10 C atoms, can be saturated or olefinically unsaturated, straight-chained or branched and which is substituted by an OH or CHO group, by means of capillary gas chromatography, wherein a stationary phase is applied containing a compound selected from the group of Heptakis-(2,3-di-O-methyl-6-O-tert.-butyldimethylsily)-β-Cyclodextrin and Heptakis-(2,3-di-O-acetyl-6-O-tert.-butyldimethylsilyl)-β-Cyclodextrin and at least one polysiloxane, wherein the mixing ratio of Cyclodextrin derivatives and polysiloxanes is adjusted to a value ranging from 10:90 to 50:50.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.