Hydrogen Bromide → 9-Bromonoscapine

HRID 1944984

Reaktionsgleichung

Reaktionsgleichung von HRID 1944984
[CH3:1][N:2]1[C@@H:11]([C@H:12]2[O:21][C:19](=[O:20])[C:18]3[C:17]([O:22][CH3:23])=[C:16]([O:24][CH3:25])[CH:15]=[CH:14][C:13]2=3)[C:10]2[C:9]([O:26][CH3:27])=[C:8]3[O:28][CH2:29][O:30][C:7]3=[CH:6][C:5]=2[CH2:4][CH2:3]1.[BrH:31].O.[Br]>>[CH3:1][N:2]1[C@@H:11]([C@H:12]2[O:21][C:19](=[O:20])[C:18]3[C:17]([O:22][CH3:23])=[C:16]([O:24][CH3:25])[CH:15]=[CH:14][C:13]2=3)[C:10]2[C:9]([O:26][CH3:27])=[C:8]3[O:28][CH2:29][O:30][C:7]3=[C:6]([Br:31])[C:5]=2[CH2:4][CH2:3]1

Komponenten

4

Edukt 3

HCID 260Hydrogen BromideHCID 275196NoscapineHCID 178514845HCID 178514845, Verbindung

Produkt 1

HCID 102550819-BromonoscapineAusbeute 82 %

Reaktionsbedingungen

Temperatur
25 °C

Versuchsvorschrift

Synthesis of 9-aminonoscapine was shown in Scheme 1. Briefly, noscapine (1) was dissolved minimum amount of 48% hydrobromic acid and then cautiously added freshly prepared bromine water. The reaction mixture stirred for 1 h at 25° C. and the resultant mixture was basified to pH 10 to afford 9-bromonoscapine in 82% yield. Refluxing compound 2 in DMF with sodium azide and sodium iodide for 15 hours gave its azido derivative (3) in quantitative yield. Reduction of azido derivative with tin chloride in the presence of thiophenol and triethylamine in THF for 2 h at 25° C. afforded the title compound, 9-aminonoscapine (4) in 83% yield.

Aufarbeitung

  1. customSynthesis of 9-aminonoscapine

Quellen und Nachweise

ORD-Eintrag
ord-770acea17ecb4bd78428b9eaa2955ce4
Quelldatensatz
uspto-grants-2013_03
Patentnummer
US08394957B2

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