(R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone
(R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone (CAS: 93239-42-0, C5H5Cl3O2) is a chiral lactone and oxetane derivative with a molecular weight of 203.45 g/mol. This compound functions as a valuable building block in asymmetric synthesis and heterocyclic chemistry. Its specific stereochemistry makes it useful for constructing complex chiral molecules, contributing to advancements in pharmaceutical and fine chemical research and development.
- IUPAC
- (R)-(+)-3-Hydroxy-3-methyl-4,4,4-trichlorobutyric acid β-lactone
- Synonyms
- (R)-(+)-3-Hydroxy-3-methyl-4,4,4-trichlorobutyric acid β-lactone

Chiral Synthesis
Serves as a key chiral building block in asymmetric synthesis, enabling the stereoselective construction of complex organic molecules. Its oxetanone ring can be opened to introduce specific functionalities and stereocenters.
Organic Synthesis Intermediate
Utilised as a versatile intermediate in organic synthesis due to its reactive lactone functionality and the presence of a trichloromethyl group. It can be employed in the preparation of various heterocyclic compounds and functionalised organic molecules.
Research and Development
Applied in academic and industrial research settings for exploring new synthetic methodologies and developing novel chemical entities. Its unique structure offers potential for diverse chemical transformations.
| Molecular weight | 203.45 |
|---|---|
| Empirical formula | C5H5Cl3O2 |
| Assay | 98% |
| Boiling point | 120 °C/0.1 mmHg(lit.) |
| Optical activity | [α]26/D +6.0°, c = 2 in ethanol |
| Melting point | 43-44 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone used for?
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(R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone is primarily used as a chiral building block in asymmetric synthesis and as an intermediate in organic synthesis for creating complex molecules and heterocyclic compounds.
What are the CAS number and chemical formula?
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The CAS number is 93239-42-0 and the chemical formula is C5H5Cl3O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product with an assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated.
How should (R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone be handled safely?
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This compound is classified as harmful if swallowed, in contact with skin, or if inhaled, and causes skin and eye irritation, and may cause respiratory irritation. Handle with appropriate personal protective equipment, including a dust mask (N95 US), eyeshields, and gloves, in a well-ventilated area. Refer to the Safety Data Sheet for full details.
How is this chemical shipped and exported?
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As a global supplier, Tech Serve Solutions expertly handles the packing, shipping, and export of fine chemicals, including (R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone, in compliance with international regulations.
How can I request a quote or sample?
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To request a quote or a sample of (R)-(+)-4-Methyl-4-(trichloromethyl)-2-oxetanone, please contact our sales department through the website or by phone.
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