Triphenylphosphine → 3-chloro-8-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl methoxy)-4-fluoro-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one

HRID 2275204

Reaktionsgleichung

Reaktionsgleichung von HRID 2275204
[Cl:1][C:2]1[C:14]([F:15])=[C:13]2[C:5]([C:6]3[C:7](=[O:23])[C:8]4[CH:21]=[CH:20][C:19]([OH:22])=[CH:18][C:9]=4[C:10]([CH3:17])([CH3:16])[C:11]=3[NH:12]2)=[CH:4][CH:3]=1.[CH3:24][C:25]1([CH3:32])[O:29][C@@H:28]([CH2:30]O)[CH2:27][O:26]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(OC(N=NC(OCC)=O)=O)C>C1COCC1>[Cl:1][C:2]1[C:14]([F:15])=[C:13]2[C:5]([C:6]3[C:7](=[O:23])[C:8]4[CH:21]=[CH:20][C:19]([O:22][CH2:30][C@H:28]5[CH2:27][O:26][C:25]([CH3:32])([CH3:24])[O:29]5)=[CH:18][C:9]=4[C:10]([CH3:17])([CH3:16])[C:11]=3[NH:12]2)=[CH:4][CH:3]=1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 736057(+)-SolketalHCID 668346463-Chloro-4-fluoro-8-hydroxy-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one

Produkt 1

HCID 668344233-chloro-8-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl methoxy)-4-fluoro-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
40 °C

Versuchsvorschrift

3-Chloro-4-fluoro-8-hydroxy-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one (Compound S2-3, 20.0 mg, 0.061 mmol) was dissolved in THF (0.25 mL), added with ((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-methanol (9.8 μL, 0.079 mmol), triphenylphosphine (20.7 mg, 0.079 mmol) and diethyl azodicarboxylic acid (35.9 μl, 0.079 mmol), and then stirred at 40° C. for 5 hr. The reaction solution was concentrated under reduced pressure, and the resulting residues were purified by silica gel column chromatography (ethyl acetate/hexane) to obtain the intermediate, 3-chloro-8-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl methoxy)-4-fluoro-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one. This compound was dissolved in THF (0.10 mL) and MeOH (0.08 ml), added with sulfuric acid (0.5 M, 0.045 ml), and then stirred at 60° C. for 1 hr. The reaction solution was added with saturated aqueous solution of sodium hydrogen carbonate, extracted with ethyl acetate and dried over anhydrous magnesium sulfate. The yellow solid obtained after concentration under reduced pressure was washed with methylene chloride/hexane solvent and filtered to obtain the title compound (4.3 mg, 18%).

Aufarbeitung

  1. concentrationThe reaction solution was concentrated under reduced pressure
  2. customthe resulting residues were purified by silica gel column chromatography (ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-2d768663d0e444ec89a92058497ff0c4
Quelldatensatz
uspto-grants-2015_09
Patentnummer
US09126931B2

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