TCI M0990 (-)-Menthyl Chloroformate is a chiral reagent that combines the optically active framework of natural menthol with a highly reactive chloroformate group. This combination makes it an important tool in asymmetric analysis and synthesis. Its principal role in the laboratory is as a chiral derivatizing agent: a compound reacted with racemic samples containing amine or hydroxyl groups so that a pair of diastereomers is formed. Unlike enantiomers, whose physical properties are identical, diastereomers can be separated and quantified using ordinary column chromatography as well as routine spectroscopic analysis.
The advantage of this reagent lies in the chiral purity of the menthyl framework, which originates from a natural source, and in the reactivity of the chloroformate group, which reacts rapidly with nucleophiles under mild conditions. The carbamate or carbonate groups that are formed are generally stable, easy to purify, and produce sufficiently clear chemical shift differences in nuclear magnetic resonance spectra, so that the diastereomer ratio can be calculated directly from peak integration. The bulky menthyl framework is also useful as a chiral auxiliary for directing stereochemistry in bond-forming reactions.
In Indonesian laboratories, this reagent is typically used in university research groups and institutional laboratories working on asymmetric synthesis, natural product chemistry, and the characterization of chiral compounds. It supports workflows where enantiomeric composition must be established without access to dedicated chiral chromatography columns, since the derivatization approach allows conventional instrumentation already available in most local facilities to deliver the required stereochemical information.
TCI brochures (PDF)
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- Chiral Building Blocks 2025-04-14 · p. 14
- Chiral derivatization of racemic amines, where the reagent converts the mixture into diastereomeric carbamates that can be separated and quantified using conventional analytical methods.
- Determination of enantiomeric ratio by NMR, because the menthyl framework induces distinct chemical shift differences that allow the diastereomer ratio to be read directly from peak integration.
- Derivatization of alcohols and hydroxyl-containing samples into menthyl carbonates, giving stable products that are easy to purify and suitable for routine chromatographic separation.
- Use as a chiral auxiliary in asymmetric synthesis, where the bulky menthyl framework directs the stereochemical outcome of bond-forming reactions under controlled conditions.
- Resolution support in natural product chemistry, since diastereomer formation permits separation on ordinary column chromatography without requiring specialised chiral stationary phases.
| Brand | TCI |
|---|---|
| CAS number | 14602-86-9 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Asymmetric Synthesis > Chiral Building Blocks |
| Pack sizes | available in standard TCI catalogue pack sizes; please confirm the current option when ordering. |
| Physical form | — |
| Storage | store according to the conditions stated on the manufacturer label and product documentation. |
- Product Code: M0990
Store this reagent in a tightly closed original container, protected from moisture, in a cool and well-ventilated area away from heat sources and incompatible materials. Chloroformates are moisture sensitive and react readily with nucleophiles, so containers should be kept sealed and handled promptly after opening. Work should be carried out in a functioning fume hood with appropriate personal protective equipment, including safety glasses, chemical-resistant gloves, and a laboratory coat. Always consult the manufacturer safety data sheet before use, and follow institutional procedures for waste collection and disposal of derivatization residues.
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