(3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxidanylidene-pentanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-keto-valeric acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-pentanoic acid 209252-17-5 Fmoc-beta-homoaspartic acid(OtBu) CAS 209252-17-5
| CAS No. | 209252-17-5 |
| Molecular Formula | C24H39NO6 |
| Molecular Weight | 437.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxidanylidene-pentanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-keto-valeric acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-pentanoic acid 209252-17-5 Fmoc-beta-homoaspartic acid(OtBu) is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxidanylidene-pentanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-keto-valeric acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-pentanoic acid 209252-17-5 Fmoc-beta-homoaspartic acid(OtBu) (CAS 209252-17-5), a certified reference material (molecular formula C24H39NO6, MW 437.57 g/mol) for analytical method development and quality control.
Structurally, (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxidanylidene-pentanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-keto-valeric acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-pentanoic acid 209252-17-5 Fmoc-beta-homoaspartic acid(OtBu) (C24H39NO6) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 437.57 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxidanylidene-pentanoic acid (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-3-[[9H-fluoren-9-ylmethoxy(oxo)methyl]amino]-5-[(2-methylpropan-2-yl)oxy]-5-oxopentanoic acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-keto-valeric acid (3R)-5-tert-butoxy-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-pentanoic acid 209252-17-5 Fmoc-beta-homoaspartic acid(OtBu) 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 | C24H39NO6 |
| Molecular Weight | 437.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2016 |
| Nitrogen Atoms | 1 |
Recommended Standards
- N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-3-phenyl-9H-fluoren-2-amine (CAS 2124224-75-3)
- BMS-978587 (CAS 1629125-65-0)
- N-([1,1':4',1''-terphenyl]-2-yl)-9,9-dimethyl-9H-fluoren-2-amine (CAS 2230885-89-7)
- Diphenhydramine impurity 16 (CAS CATO-C4X-142416)
- 2-(4-(2-METHYLCYCLOHEXYLOXY)PHENYL)ETHANOL (CAS 2089650-02-0)
- 8-(trifluoromethyl)-9H-purin-2-amine (CAS 10179-89-2)
- 1-[[2-bromo-5-(trifluoromethyl)phenyl]methyl]-piperidine (CAS 913296-73-8)
- 2-(1-Cyclohexyl-piperidin-3-yl)-ethylamine dihydrochloride (CAS 1361113-14-5)
- 2,2-Difluoro-1-pyrrolidin-1-yl-ethanone (CAS 109872-83-5)
- 2-(4-Methoxyphenyl)-5-phenyl-1H-imidazole-4-thiol (CAS 1325304-88-8)
- 5-Methylhexan-2-one oxime (CAS 624-44-2)
- 4-{3-bromo-1H,4H,6H-furo[3,4-c]pyrazol-1-yl}-1-methylpiperidine (CAS 1780032-80-5)
- [4-(propan-2-yl)cyclohexyl]methanamine (CAS 749799-45-9)
- Semaglutide impurity 274 (CAS CATO-C4X-2226274)
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