C28H29NO5
459.5 g/mol
Pharmaceutical IntermediateWarning
Fmoc-L-Tyr(tBu)-OH
CAS71989-38-3
Category
Pharmaceutical Intermediate
Compound Class
Peptide
Primary Use
Pharmaceutical Intermediate
Fmoc-L-Tyr(tBu)-OH is a derivative of the amino acid tyrosine, modified with a fluorenylmethoxycarbonyl (Fmoc) protecting group on the amino function and a tert-butyl (tBu) group on the phenolic hydroxyl. It serves as a building block in solid-phase peptide synthesis, enabling the sequential construction of peptides with controlled side-chain protection.
Building block for solid-phase peptide synthesisIntermediate in the manufacture of custom peptides
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
SimilarStructure SimilarSimilarity 0.76
N-Fmoc-4-(tert-butoxycarbonylmethoxy)-L-phenylalanine
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SimilarStructure SimilarSimilarity 0.73
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ReferenceSame Category
5-aminoimidazole-4-carboxamide hydrochloride
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ReferenceSame Category
L-(4-Methylphenyl)-4,4,4-trifluorobutane-1,3-dione
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Related Reading
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for Fmoc-L-Tyr(tBu)-OH (CAS 71989-38-3) is 2924.29.
HS code (international, 6-digit)
2924.29
EU CN code (8-digit)
2924 29 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[4-[(2-methylpropan-2-yl)oxy]phenyl]propanoic acid
InChIKey
JAUKCFULLJFBFN-VWLOTQADSA-N
SMILES
CC(C)(C)OC1=CC=C(C=C1)C[C@@H](C(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24
Synonyms (25)
- Fmoc-L-Tyr(tBu)-OH
- Fmoc-O-tert-butyl-L-tyrosine
- Fmoc-Tyr(But)-OH
- Fmoc-Tyr(OtBu)
- Fmoc-Tyr(tBu)
- Fmoc-Tyr(tBu)-OH
- N-Fmoc-O-tert-butyl-tyrosine
- n-fmoc-o-t-butyl-l-tyrosine
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