(1S,2S)-1-Amino-2-benzyloxycyclopentane
(1S,2S)-1-Amino-2-benzyloxycyclopentane (CAS: 181657-57-8) is a chiral organic compound with the molecular formula C12H17NO and a molecular weight of 191.27 g/mol. Produced by BASF, this amine serves as a valuable chiral building block in asymmetric synthesis and organic chemistry. Its protected alcohol functionality and stereochemically defined structure make it suitable for constructing complex molecules, particularly in the pharmaceutical and fine chemical industries. It is typically supplied with high enantiomeric purity.
- IUPAC
- (1S)-trans-2-(Phenylmethoxy)cyclopentanamine,(1S,2S)-trans-2-Benzyloxycyclopentylamine
- Synonyms
- (1S)-trans-2-(Phenylmethoxy)cyclopentanamine(1S,2S)-trans-2-Benzyloxycyclopentylamine

Chiral Building Block
Utilised in asymmetric synthesis to introduce specific stereochemistry into target molecules. Its defined chiral centres are crucial for the stereoselective construction of complex organic compounds.
Pharmaceutical Intermediates
Serves as a key intermediate in the synthesis of pharmaceutically active compounds. Its structure can be incorporated into drug candidates requiring specific spatial arrangements for biological activity.
Organic Synthesis Reagent
A versatile reagent in general organic synthesis, particularly where chiral amine or protected alcohol functionalities are required. Enables the formation of new carbon-nitrogen or carbon-oxygen bonds.
| Molecular weight | 191.27 |
|---|---|
| Empirical formula | C12H17NO |
| Assay | ≥97.5% (GC)98% |
| Grade | produced by BASF |
| Optical purity | enantiomeric excess: ≥98% |
| Storage temperature | 2-8°C |
| Impurities tested | ≤5% water |


Hazard statements
- H301Toxic if swallowed
- H311Toxic in contact with skin
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Flash point | >110 °C / >230 °F |
|---|---|
| Transport (UN / ADR) | UN 2735PSN1 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 21/22-34 |
| Safety statements (S) | 26-36/37/39-45 |
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 (1S,2S)-1-Amino-2-benzyloxycyclopentane used for?
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(1S,2S)-1-Amino-2-benzyloxycyclopentane is primarily used as a chiral building block in asymmetric synthesis and as an intermediate in the preparation of complex organic molecules, including potential pharmaceutical compounds.
What are the CAS number and formula for this compound?
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The CAS number is 181657-57-8, and the empirical formula is C12H17NO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (1S,2S)-1-Amino-2-benzyloxycyclopentane produced by BASF with an assay of ≥97.5% (GC) or 98%, and an enantiomeric excess of ≥98%. It is not represented as USP, BP, or EP grade.
How should (1S,2S)-1-Amino-2-benzyloxycyclopentane be handled safely?
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This compound is classified as Danger, with hazards including H301, H311, and H314, indicating toxicity if swallowed, in contact with skin, and causing severe skin burns and eye damage. Handle with appropriate personal protective equipment (gloves, eye protection) in a well-ventilated area and follow emergency procedures (P280, P305 + P351 + P338, P310).
How is this chemical packed, shipped, and exported?
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(1S,2S)-1-Amino-2-benzyloxycyclopentane is packaged according to regulatory standards for hazardous materials. It is shipped and exported by Tech Serve Solutions, adhering to international regulations for the transport of dangerous goods (UN 2735, Class 8, PG II).
How can I request a sample or a quote for this product?
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To request a sample or a quote for (1S,2S)-1-Amino-2-benzyloxycyclopentane, please contact the Tech Serve Solutions sales team through our website or by phone.
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