Fmoc-4,5-dehydro-Leu-OH CAS 87720-55-6
| CAS No. | 87720-55-6 |
| Molecular Formula | C21H21NO4 |
| Molecular Weight | 351.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C21H21NO4, Fmoc-4,5-dehydro-Leu-OH contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 351.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Fmoc-4,5-dehydro-Leu-OH (CAS 87720-55-6), a certified reference material (molecular formula C21H21NO4, MW 351.40 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Fmoc-4,5-dehydro-Leu-OH meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C21H21NO4 |
| Molecular Weight | 351.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
Related Fmoc Standards
- Fmoc-1-aminocyclopentane-1-carboxylic acid (CAS 117322-30-2)
- (4S)-1-Fmoc-4-methyl-L-proline (CAS 1228577-03-4)
- Fmoc-α-Me-D-Pro-OH (CAS 1286768-33-9)
- Fmoc-Inp-OH (CAS 148928-15-8)
- 1-Fmoc-3-piperidinecarboxylic Acid (CAS 158922-07-7)
- Fmoc-L-β-homoproline (CAS 193693-60-6)
- (s)-1-fmoc-piperidine-3-carboxylic acid (s)-fmoc-nip (s)-fmoc-piperidine-3-carboxylic acid (s)-piperidine-1,3-dicarboxylic acid 1-(9h-fluoren-9-ylmethyl) ester 1-n-fmoc-piperidine-3(s)-carboxylic acid 193693-68-4 L-1-Fmoc-Nipecotic acid fmoc-(s)-nip fmoc-(s)-nipecotic acid (CAS 193693-68-4)
- Fmoc-(1R,2R)-2-aminocyclopentane Carboxylic Acid (CAS 359586-69-9)
Recommended Standards
- H-Phe-Trp-OH (CAS 24587-41-5)
- Fmoc-Homopro-OH (CAS 86069-86-5)
- Z-Ala-Lys-OH (CAS 76264-07-8)
- Fmoc-α-cyclopropyl-Ala-OH (CAS 1926163-87-2)
- (2-(Aminomethyl)-5-fluorophenyl)boronic acid (CAS 850689-32-6)
- 8-Iodo-4-quinolinamine (CAS 65340-76-3)
- 6-Methyl-8-quinoxalinesulfonyl Chloride (CAS 21863-51-4)
- 4-(Difluoromethyl)-3,5-difluorobenzoic acid (CAS 1807176-85-7)
- 3-(1,2,3,6-Tetrahydropyridin-4-yl)-1H-indole-5-carbonitrile (CAS 127792-81-8)
- 1-Ethylimidazolidine-2,4-dione (CAS 61893-09-2)
- 2-Chloro-N-cyclohexyl-5-hydroxybenzamide (CAS 1394923-37-5)
- 2,7-Dibromo-5H-pyrrolo[2,3-b]pyrazine (CAS 1209703-87-6)
- N-Hexadecanoyl-Valine Sodium Salt (CAS 32190-54-8)
- Semaglutide impurity 237 (CAS CATO-C4X-2226237)
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