N-Boc-trans-4-tosyloxy-L-proline methyl ester
Also known as: BOC-trans-4-tosyloxy-L-proline methyl ester, 1-O-tert-butyl 2-O-methyl (2S,4R)-4-(4-methylphenyl)sulfonyloxypyrrolidine-1,2-dicarboxylate, 1-(1,1-dimethylethyl) 2-methyl (2S,4R)-4-[[(4-methylphenyl)sulfonyl]oxy]-1,2-pyrrolidinedicarboxylate, N-(tert-Butoxycarbonyl)-trans-4-(p-toluenesulfonyloxy)-L-proline methyl ester, (4R)-4-TsO-N-Boc-Pro-OMe, N-Boc-trans-4-(p-tosyloxy)-L-proline methyl ester, trans-N-tert-Butyloxycarbonyl-4-tosyloxy-L-proline methyl ester, N-Boc-trans-4-(p-toluenesulfonyloxy)-L-proline methyl ester
N-Boc-trans-4-tosyloxy-L-proline methyl ester (CAS 88043-21-4) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C18H25NO7S and a molecular weight of 399.459 g/mol. Key properties include a melting point of 77.0 to 81.0 °C, a boiling point of 508.1±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 261.1±30.1 °C. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 88043-21-4
- Jingsj CID
- J-1551668-4
- Molecular Formula
- C18H25NO7S
- Molecular Weight
- 399.459 g/mol
- Category
- Solvents
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 77.0 to 81.0 °C |
|---|---|
| Boiling Point | 508.1±50.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 261.1±30.1 °C |
| Exact Mass | 399.135162 |
| PSA | 107.59000 |
| LogP | 1.77 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.554 |
| Storage Conditions | 2-8°C |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of N-Boc-trans-4-tosyloxy-L-proline methyl ester?
The CAS number of N-Boc-trans-4-tosyloxy-L-proline methyl ester is 88043-21-4.
What are the molecular formula and molecular weight of N-Boc-trans-4-tosyloxy-L-proline methyl ester?
N-Boc-trans-4-tosyloxy-L-proline methyl ester has molecular formula C18H25NO7S and molecular weight 399.459 g/mol.
Is N-Boc-trans-4-tosyloxy-L-proline methyl ester hazardous?
N-Boc-trans-4-tosyloxy-L-proline methyl ester has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
What are the upstream and downstream products of N-Boc-trans-4-tosyloxy-L-proline methyl ester?
For N-Boc-trans-4-tosyloxy-L-proline methyl ester, Upstream Products: N-Boc-trans-4-hydroxy-L-proline methyl ester, p-Toluenesulfonyl chloride, L-4-Hydroxyproline methyl ester hydrochloride; Downstream Products: cis-N-Boc-4-cyano-L-proline methyl ester, Boc-trans-4-cyano-L-proline methyl ester, Methyl (2S,4S)-1-Boc-4-aminopyrrolidine-2-carboxylate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "N-Boc-trans-4-tosyloxy-L-proline methyl ester (CAS 88043-21-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1551668-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.