Maximum quantity allowed is 999
CAS RN: 161265-03-8 | Numéro de produit: R0300
Xantphos (HPMC encapsulated)
Pureté:
- 4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene (HPMC encapsulated)
| Taille | Prix unitaire | Belgique | Japon * | Quantité |
Informations d'expédition
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|---|---|---|---|---|---|
| 10EACH |
€ 85,00
|
Contactez-nous | 18 |
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*Stock disponible en Belgique : Expédition le jour même
*Stock disponible au Japon : Veuillez consulter la simulation d'expédition pour une estimation des délais d'expédition (hors articles réglementés et expédition avec Carboglace)
Informations supplémentaires sur le produit:
Contents (per one capsule)
- Xantphos ca. 0.125 mmol
Uses of Reagent
- Applicable to palladium-catalyzed reactions due to a ligand encapsulated in HPMC capsules
Soluble Solvents
- Water, DMSO, DMF, 1,4-Dioxane (50°C), THF/Water mixture, 1,2-Dimethoxyethane/Water mixture
Related Product
- B2709 4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene
| Numéro de produit | R0300 |
| Formule moléculaire / poids moléculaire | C__3__9H__3__2OP__2 = 578.63 |
| Etat physique (20 ° C) | Solid |
Condition de stockage
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Room Temperature (Recommended in a cool and dark place, <15°C) |
| Stocker sous gaz inerte | Store under inert gas |
| Condition à éviter | Hygroscopic |
| CAS RN | 161265-03-8 |
| Appearance | White to Almost white capsule |
| Functionality test (conversion ratio) | min.90.0 % |
| N ° SH (import / export) (TCI-E) | 3822190090 |
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Used Chemicals
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Procedure
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Pd2(dba)3 (HPMC encapsulated) (one capsule) and Xantphos (HPMC encapsulated) (one capsule) were added to a solution of 2-acetamido-5-bromo-4-methylpyridine (570 mg, 2.50 mmol), cesium carbonate (900 mg, 2.80 mmol, 1.1 eq.) and phenylboronic acid (460 mg, 3.80 mmol, 1.5 eq.) in THF/water (4:1, 20 mL) at room temperature and the reaction mixture was stirred at 100 °C for 2 hours. The solution was then diluted with ethyl acetate (3.2 mL) and sat. Na2SO4 aq. (3.2 mL), and filtered through Celite pad and the filtrate was extracted with ethyl acetate (10 mL x 3). The organic layer was washed with water (15 mL) and brine (15 mL), dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by silica gel chromatography (ethyl acetate:hexane = 0:1 - 4:1) to afford 2-acetamido-4-methyl-5-phenylpyridine (408 mg, 72% yield) as a pale yellow solid.
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Experimenter’s Comments
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The reaction mixture was monitored by GC.
The material of the capsule is water-soluble HPMC (hydroxypropyl methylcellulose).
The shape of the capsule is like the image below and Pd2(dba)3 (ca. 60 μmol) and Xantphos (ca. 125 μmol) are encapsulated in each capsule, respectively.
The capsule disintegrates as shown in the image below when stirred in the solvent for about 15 minutes, releasing its content.
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Analytical Data
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2-Acetamido-4-methyl-5-phenylpyridine
1H NMR (400 MHz, CDCl3); δ 9.24-9.06 (brs, 1H), 8.16 (s, 1H), 8.10 (s, 1H), 7.46-7.36 (m, 3H), 7.30-7.29 (m, 2H), 2.32 (s, 3H), 2.21 (s, 3H).
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Lead Reference
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- Reagent and Catalyst Capsules: A Chemical Delivery System for Reaction Screening and Parallel Synthesis
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Other References
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- HPMC: A Biomass-Based Semisynthetic Sustainable Additive Enabling Clean and Fast Chemistry in Water
Documents
Fiche de sécurité (FDS)
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Spécifications
CoA et autres Certificats
Exemple de CoA
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Graphiques analytiques
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