Fmoc-Cys(tBu)-OH - ≥98%, mixture of enantiomers , CAS No.67436-13-9

CAS: 67436-13-9 Cat. No.: F141453 Molecular Weight: 399.5 Beilstein Registry Number: 4577030 EC Number: 164-208-4 PubChem CID: 7009544
AVAILABLE TO ORDER
GRADE & PURITY ≥98% mixture of enantiomers
Synonyms
Fmoc-S-tert-butyl-L-cysteine Nα-Fmoc-S-tert-butyl-L-cysteine N-(9-Fluorenylmethyloxycarbonyl)-S-tert-butyl-L-cysteine
Storage
Store at 2-8°C
Shipped In
Wet ice
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
5g
F141453-5g
3
$66.90
25g
F141453-25g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$249.90
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Why this grade

≥98%, mixture of enantiomers for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Store at 2-8°C Ships Wet ice Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Fmoc-S-tert-butyl-L-cysteine Nα-Fmoc-S-tert-butyl-L-cysteine N-(9-Fluorenylmethyloxycarbonyl)-S-tert-butyl-L-cysteine
Specifications & Purity
≥98%, mixture of enantiomers
Storage
Store at 2-8°C
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥98%
Names and Identifiers
Pubchem Sid504764494
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504764494
Canonical SmilesCC(C)(C)SCC(C(=O)O)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
IUPAC Name(2R)-3-tert-butylsulfanyl-2-(9H-fluoren-9-ylmethoxycarbonylamino)propanoic acid
InChIKeyIXAYZHCPEYTWHW-IBGZPJMESA-N
INCHI1S/C22H25NO4S/c1-22(2,3)28-13-19(20(24)25)23-21(26)27-12-18-16-10-6-4-8-14(16)15-9-5-7-11-17(15)18/h4-11,18-19H,12-13H2,1-3H3,(H,23,26)(H,24,25)/t19-/m0/s1
Isomeric SMILES CC(C)(C)SC[C@@H](C(=O)O)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
WGK Germany 3
PubChem CID 7009544
Molecular Weight 399.5
Beilstein 4577030
Reaxy-Rn 4577031

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassFluorenes
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentFluorenes
Alternative Parents Cysteine and derivatives  Carbamate esters  Sulfenyl compounds  Monocarboxylic acids and derivatives  Dialkylthioethers  Carboxylic acids  Organonitrogen compounds  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAromatic homopolycyclic compounds
Substituents Fluorene - Cysteine or derivatives - Alpha-amino acid or derivatives - Carbamic acid ester - Carboxylic acid derivative - Carboxylic acid - Monocarboxylic acid or derivatives - Thioether - Sulfenyl compound - Dialkylthioether - Organooxygen compound - Organonitrogen compound - Carbonyl group - Organosulfur compound - Organic nitrogen compound - Organic oxide - Organic oxygen compound - Hydrocarbon derivative - Aromatic homopolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as fluorenes. These are compounds containing a fluorene moiety, which consists of two benzene rings connected through either a cyclopentane, cyclopentene, or cyclopenta-1,3-diene.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

2 results found

Lot NumberCertificate TypeDateItem
K1823161Certificate of AnalysisJun 15, 2026 F141453
K1823160Certificate of AnalysisJun 15, 2026 F141453
Chemical and Physical Properties
Specific Rotation[α]-25° (C=1,DMF)
Melt Point(°C)136-140°C
Molecular Weight399.500 g/mol
XLogP34.300
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count5
Rotatable Bond Count8
Exact Mass399.15 Da
Monoisotopic Mass399.15 Da
Topological Polar Surface Area101.000 Ų
Heavy Atom Count28
Formal Charge0
Complexity539.000
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Solution Calculators
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