N,O-Bis(tert-butoxycarbonyl)-L-tyrosine

Also known as: Boc-Tyr(Boc)-OH, BOC-TYR(BOC)-OH, Boc-L-Tyr(Boc)-OH, N,O-Di-Boc-L-tyrosine, N,O-Bis[(1,1-dimethylethoxy)carbonyl]-L-tyrosine, N,O-di-tert-butoxycarbonyl-L-tyrosine, L-Tyrosine, N,O-bis[(1,1-dimethylethoxy)carbonyl]-

N,O-Bis(tert-butoxycarbonyl)-L-tyrosine (CAS 20866-48-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C19H27NO7 and a molecular weight of 381.420 g/mol. Key properties include a boiling point of 528.4±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 273.4±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20866-48-2
Jingsj CID: J-1957957-8
Molecular Formula: C₁₉H₂₇NO₇
Molecular Weight: 381.420 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	528.4±50.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	273.4±30.1 °C
Exact Mass	381.178741
PSA	111.16000
LogP	3.47
Vapor Pressure	0.0±1.5 mmHg at 25°C
Refractive Index	1.517
Storage Conditions	2-8°C

Activity & Biological Data

Additional Information	[1]. Osaka K, et al. Sequential Intermolecular Radical Addition and Reductive Radical Cyclization of Tyrosine and Phenylalanine Derivatives with Alkenes via Photoinduced Decarboxylation: Access to Ring-Constrained γ-Amino Acids. J Org Chem. 2019 Aug 2;84(15):9480-9488.

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of N,O-Bis(tert-butoxycarbonyl)-L-tyrosine?

The CAS number of N,O-Bis(tert-butoxycarbonyl)-L-tyrosine is 20866-48-2.

What are the molecular formula and molecular weight of N,O-Bis(tert-butoxycarbonyl)-L-tyrosine?

N,O-Bis(tert-butoxycarbonyl)-L-tyrosine has molecular formula C19H27NO7 and molecular weight 381.420 g/mol.

What are the upstream and downstream products of N,O-Bis(tert-butoxycarbonyl)-L-tyrosine?

For N,O-Bis(tert-butoxycarbonyl)-L-tyrosine, Upstream Products: Di-tert-butyl dicarbonate, N-(tert-Butoxycarbonyl)-L-tyrosine, L-Tyrosine; Downstream Products: 1,3-Dicyclohexylurea, Deltorphin, Deltorphin I TFA.

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

Last updated: 8/21/2026

How to cite: Jingsj. "N,O-Bis(tert-butoxycarbonyl)-L-tyrosine (CAS 20866-48-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1957957-8 (accessed 2026-11-09).

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