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(2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid

Also known as: (2R,4R)-1-(tert-Butoxycarbonyl)-4-hydroxypyrrolidine-2-carboxylic acid, (2R,4R)-4-hydroxy-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carboxylic acid, Boc-cis-4-Hydroxy-D-proline, Boc-Cis-4-Hydroxy-D-Proline, N-Boc-cis-4-Hydroxy-D-proline, N-t-Boc-cis-4-hydroxy-D-proline, MFCD02094407

(2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid (CAS 135042-12-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H17NO5 and a molecular weight of 231.246 g/mol. Key properties include a melting point of 145ºC, a boiling point of 390.9±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 190.2±27.9 °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.
135042-12-5
Jingsj CID
J-31761-3
Molecular Formula
C10H17NO5
Molecular Weight
231.246 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point145ºC
Boiling Point390.9±42.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point190.2±27.9 °C
Exact Mass231.110672
PSA87.07000
LogP-0.71
Vapor Pressure0.0±2.0 mmHg at 25°C
Refractive Index1.531

GHS Safety & Compliance

IrritantSignal word: Warning
  • H319 — Causes serious eye irritation

Activity & Biological Data

TargetNon-cleavable
Additional Information[1]. Beck A, et al. Strategies and challenges for the next generation of antibody-drug conjugates. Nat Rev Drug Discov. 2017;16(5):315-337. [2]. Nalawansha DA, et al. PROTACs: An Emerging Therapeutic Modality in Precision Medicine. Cell Chem Biol. 2020;27(8):998-985.

Customs & Trade Information

HS Code2933990090
Summary2933990090. 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 (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid?

The CAS number of (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid is 135042-12-5.

What are the molecular formula and molecular weight of (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid?

(2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid has molecular formula C10H17NO5 and molecular weight 231.246 g/mol.

Is (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid hazardous?

(2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.

What are the upstream and downstream products of (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid?

For (2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid, Upstream Products: Di-tert-butyl dicarbonate, cis-4-Hydroxy-D-proline, cis-4-Hydroxy-D-proline hydrochloride; Downstream Products: N-Boc-4-oxo-D-proline, (2R,4R)-tert-Butyl 4-hydroxy-2-(hydroxymethyl)pyrrolidine-1-carboxylate, 1,2-Pyrrolidinedicarboxylic acid, 4-methoxy-, 1-(1,1-dimethylethyl) 2-methyl ester, (2R,4R)-.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "(2R,4R)-N-Boc-4-hydroxypyrrolidine-2-carboxylic acid (CAS 135042-12-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31761-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.