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Sodium hydride → methyl 7-[(2-bromo-4-fluorobenzenesulfonyl)-(2-trimethylsilanyl-ethoxymethyl)-amino]-4H-furo[2,3-c]chromene-6-carboxylate

HRID 1778372
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1778372
[H-].[Na+].[Br:3][C:4]1[CH:9]=[C:8]([F:10])[CH:7]=[CH:6][C:5]=1[S:11]([NH:14][C:15]1[C:24]([C:25]([O:27][CH3:28])=[O:26])=[C:23]2[C:18]([C:19]3[CH:31]=[CH:30][O:29][C:20]=3[CH2:21][O:22]2)=[CH:17][CH:16]=1)(=[O:13])=[O:12].[CH3:32][Si:33]([CH3:40])([CH3:39])[CH2:34][CH2:35][O:36][CH2:37]Cl>C1COCC1>[Br:3][C:4]1[CH:9]=[C:8]([F:10])[CH:7]=[CH:6][C:5]=1[S:11]([N:14]([CH2:37][O:36][CH2:35][CH2:34][Si:33]([CH3:40])([CH3:39])[CH3:32])[C:15]1[C:24]([C:25]([O:27][CH3:28])=[O:26])=[C:23]2[C:18]([C:19]3[CH:31]=[CH:30][O:29][C:20]=3[CH2:21][O:22]2)=[CH:17][CH:16]=1)(=[O:12])=[O:13]
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Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl etherHCID 66685486methyl 7-(2-bromo-4-fluorobenzenesulfonylamino)-4H-furo[2,3-c]chromene-6-carboxylate2×

Produkt 1

HCID 66685296methyl 7-[(2-bromo-4-fluorobenzenesulfonyl)-(2-trimethylsilanyl-ethoxymethyl)-amino]-4H-furo[2,3-c]chromene-6-carboxylateAusbeute 94,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Sodium hydride (60% dispersion in oil, 0.304 g) was added to a stirred solution of methyl 7-(2-bromo-4-fluorobenzenesulfonylamino)-4H-furo[2,3-c]chromene-6-carboxylate (Intermediate 7, 2.93 g) in THF (30 mL). The resultant mixture was stirred at room temperature for 5 minutes until effervescence had ceased. 2-(trimethylsilyl)ethoxymethyl chloride (1.27 g) was added and the solution was stirred at room temperature for one hour. The mixture was concentrated in vacuo and the residue was dissolved in ethyl acetate, washed with water, dried (Na2SO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica, eluting with a mixture of ethyl acetate and cyclohexane, with a gradient of 0-20% to give methyl 7-[(2-bromo-4-fluorobenzenesulfonyl)-(2-trimethylsilanyl-ethoxymethyl)-amino]-4H-furo[2,3-c]chromene-6-carboxylate (3.51 g) as a white foam.

Aufarbeitung

  1. concentrationThe mixture was concentrated in vacuo
  2. dissolutionthe residue was dissolved in ethyl acetate
  3. washwashed with water
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. customThe filtrate was evaporated to dryness
  7. customthe residue was purified by chromatography on silica
  8. washeluting with a mixture of ethyl acetate and cyclohexane, with a gradient of 0-20%

Quellen und Nachweise

ORD-Eintrag
ord-a387c4dd7ccf454fa832c95194733501
Quelldatensatz
uspto-grants-2016_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09266896B2

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