ChemAbout
© 2026 ChemAbout
Insights|Privacy Policy|Terms of Service|[email protected]
Home/Compounds/Pharmaceutical Intermediate/Fmoc-L-cysteine
C18H17NO4S
343.4 g/mol
Pharmaceutical Intermediate

Fmoc-L-cysteine

CAS135248-89-4
Category
Pharmaceutical Intermediate
Compound Class
Peptide
Primary Use
Pharmaceutical Intermediate

Fmoc-L-cysteine is a protected cysteine derivative used in solid-phase peptide synthesis. It features a fluorenylmethoxycarbonyl (Fmoc) protecting group on the amino group, with a free thiol side chain, and is a standard building block for constructing peptides in research and pharmaceutical manufacturing.

peptide synthesis intermediateresearch reagent for solid-phase peptide synthesis

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.

Sourcing or supplying this compound?

List your inventory or post a purchase request

CAS 135248-89-4

List This Product
Sign in to publish supply information
Request This Product
Submit a request without registering

Related Compounds

SimilarStructure SimilarSimilarity 0.77

Fmoc-L-aspartic acid

CAS119062-05-4

research compound

SimilarStructure SimilarSimilarity 0.73

N-(fluorenyl-9-methoxycarbonyl)leucine

CAS35661-60-0

pharmaceutical intermediate

SimilarStructure SimilarSimilarity 0.73

Fmoc-D-Asparagine

CAS108321-39-7

research compound

SimilarStructure SimilarSimilarity 0.73

Fmoc-D-leucine

CAS114360-54-2

pharmaceutical intermediate

ApplicationSame Use

N-Boc-N'-Fmoc-L-ornithine

CAS150828-96-9

pharmaceutical intermediate

ApplicationSame Use

N-Fmoc-N'-Boc-L-2,4-diaminobutyric acid

CAS125238-99-5

pharmaceutical intermediate

ApplicationSame Use

N-Boc-N'-Fmoc-D-2,3-diaminopropionic acid

CAS131570-56-4

pharmaceutical intermediate

ApplicationSame Use

TERT-BUTYL N-[(1S)-1-(BENZYLCARBAMOYL)-2-HYDROXYETHYL]CARBAMATE

CAS141108-78-3

pharmaceutical intermediate

Identifiers
IUPAC Name

(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-sulfanylpropanoic acid

InChIKey

RMTDKXQYAKLQKF-INIZCTEOSA-N

SMILES

C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)N[C@@H](CS)C(=O)O

Synonyms (12)
  • FMOC-CYS-OH
  • FMOC-L-CYS-OH
  • Fmoc-L-cysteine
  • N-Fmoc-L-cysteine
  • fmoc-cysteine