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Fmoc-Tyr(tBu)-OH

Also known as: Fmoc-Tyr(tBu)-OH, Fmoc-O-tert-butyl-L-tyrosine, N-(9-Fluorenylmethoxy carbonyl)-o-tert-butyl-L-tyrosine, O-tert-Butyl-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-tyrosine, (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[4-[(2-methylpropan-2-yl)oxy]phenyl]propanoic acid, L-Tyrosine, O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-, N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-O-(2-methyl-2-propanyl)-L-tyrosine, O-(tert-Butyl)-N-((9H-fluoren-9-ylmethoxy)carbonyl)-L-tyrosine, MFCD08059708, EINECS 276-262-7

Fmoc-Tyr(tBu)-OH (CAS 71989-38-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C28H29NO5 and a molecular weight of 459.534 g/mol. Key properties include a melting point of ~150 °C (dec.), a boiling point of 658.2±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 351.9±31.5 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.

CAS No.
71989-38-3
Jingsj CID
J-49009-5
Molecular Formula
C28H29NO5
Molecular Weight
459.534 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point~150 °C (dec.)
Boiling Point658.2±55.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point351.9±31.5 °C
Exact Mass459.204559
PSA84.86000
LogP6.55
Vapor Pressure0.0±2.1 mmHg at 25°C
Refractive Index1.600

Activity & Biological Data

Additional Information[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1144.

Frequently Asked Questions

What is the CAS number of Fmoc-Tyr(tBu)-OH?

The CAS number of Fmoc-Tyr(tBu)-OH is 71989-38-3.

What are the molecular formula and molecular weight of Fmoc-Tyr(tBu)-OH?

Fmoc-Tyr(tBu)-OH has molecular formula C28H29NO5 and molecular weight 459.534 g/mol.

Which suppliers offer Fmoc-Tyr(tBu)-OH?

1 supplier(s) listed; request a quote for pricing.

What are the upstream and downstream products of Fmoc-Tyr(tBu)-OH?

For Fmoc-Tyr(tBu)-OH, Upstream Products: Fmoc-OSu, Methyl L-tyrosinate hydrochloride, Fmoc-D-tyrosine; Downstream Products: [Leu5]-Enkephalin, Fmoc-O-tert-butyl-L-tyrosine pentafluorophenyl ester, Fmoc-β-HomoTyr(tBu)-OH.

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

Last updated:

How to cite: Jingsj. "Fmoc-Tyr(tBu)-OH (CAS 71989-38-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49009-5 (accessed 2026-11-09).

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