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(2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid

Also known as: Fmoc-Trans-4-Fluoro-Pro-OH, (2S,4R)-4-Fluoropyrrolidine-2-carboxylic acid,N-FMOC protected, (2S,4R)-N-Fmoc-4-fluoroproline, (2S,4R)-N-Fmoc-trans-4-Fluoro-L-proline, (2S,4R)-N-fmoc-4-fluoropyrrolidine-2-carboxylic acid, 1,2-Pyrrolidinedicarboxylic acid, 4-fluoro-, 1-(9H-fluoren-9-ylmethyl) ester, (2S,4R)-, 1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid, 1-[9H-fluoren-9-ylmethoxy(oxo)methyl]-4-fluoro-2-pyrrolidinecarboxylic acid, 4-fluoranyl-1-(9H-fluoren-9-ylmethoxycarbonyl)pyrrolidine-2-carboxylic acid, FMOC-TRANS-4-FLUORO-L-PROLINE, FMOC-TRANS-4-FLUORO-PRO-OH, FMOC-TRANS-4-FLUORO-PROLINE, N-ALPHA-(9-FLUORENYLMETHOXYCARBONYL)-(2S,4R)-4-FLUORO-PYRROLIDINE-2-CARBOXYLIC ACID, N-ALPHA-(9-FLUORENYLMETHOXYCARBONYL)-TRANS-4-FLUORO-L-PROLINE, N-FMOC-TRANS-4-FLUORO-L-PROLINE

(2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid (CAS 203866-20-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C20H18FNO4 and a molecular weight of 355.36000 g/mol. Key properties include a boiling point of 556.024ºC at 760 mmHg, a density of 1.403g/cm3 and a flash point of 290.073ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
203866-20-0
Jingsj CID
J-1454995-2
Molecular Formula
C20H18FNO4
Molecular Weight
355.36000 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point556.024ºC at 760 mmHg
Density1.403g/cm3
Flash Point290.073ºC
Exact Mass355.12200
PSA66.84000
LogP3.37040
Vapor Pressure0mmHg at 25°C
Refractive Index1.646
Storage Conditions2-8°C

Frequently Asked Questions

What is the CAS number of (2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid?

The CAS number of (2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid is 203866-20-0.

What are the molecular formula and molecular weight of (2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid?

(2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid has molecular formula C20H18FNO4 and molecular weight 355.36000 g/mol.

What are the upstream and downstream products of (2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid?

For (2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid, Upstream Products: 9-Fluorenylmethyl chloroformate, (2S,4S)-4-Fluoropyrrolidine-2-carboxylic acid, Fmoc-OSu.

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

Last updated:

How to cite: Jingsj. "(2S,4R)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid (CAS 203866-20-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1454995-2 (accessed 2026-11-09).

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