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Diisopropylethylamine → N'-(8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carbonyl)-N'-isopropyl-hydrazinecarboxylic acid tert-butyl ester

HRID 1800134
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1800134
[Br:1][C:2]1[CH:18]=[CH:17][C:5]2[C:6]3[N:10]([CH2:11][CH2:12][O:13][C:4]=2[CH:3]=1)[CH:9]=[C:8]([C:14]([OH:16])=O)[N:7]=3.[C:19]([O:23][C:24]([NH:26][NH:27][CH:28]([CH3:30])[CH3:29])=[O:25])([CH3:22])([CH3:21])[CH3:20].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C>[C:19]([O:23][C:24]([NH:26][N:27]([C:14]([C:8]1[N:7]=[C:6]2[N:10]([CH2:11][CH2:12][O:13][C:4]3[CH:3]=[C:2]([Br:1])[CH:18]=[CH:17][C:5]=32)[CH:9]=1)=[O:16])[CH:28]([CH3:30])[CH3:29])=[O:25])([CH3:22])([CH3:21])[CH3:20]
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Komponenten

6

Edukt 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 11217534N'-(propan-2-yl)(tert-butoxy)carbohydrazideHCID 582043519-Bromo-5,6-dihydrobenzo[F]imidazo[1,2-D][1,4]oxazepine-2-carboxylic acid

Produkt 1

HCID 58204773
N'-(8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carbonyl)-N'-isopropyl-hydrazinecarboxylic acid tert-butyl ester
Ausbeute 104,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

To a mixture of 8-bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid (1.92 g, 6.2 mmol) and N′-isopropyl-hydrazinecarboxylic acid tert-butyl ester (1.30 g, 7.5 mmol) in DMF (20 mL) at 0° C. was added DIPEA (2.70 mL, 15.5 mmol) and HATU (3.54 g, 9.3 mmol). The reaction mixture was stirred for 7 h at RT before the addition of DMF (40 mL) and stirring overnight. The reaction mixture was concentrated in vacuo and the resultant residue partitioned between DCM and water. The aqueous phase was extracted with DCM (×2) before the combined organic extracts were washed sequentially with 10% citric acid solution, saturated sodium bicarbonate solution then brine, dried (Na2SO4) and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0-90% ethyl acetate in cyclohexane) to give N′-(8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carbonyl)-N′-isopropyl-hydrazinecarboxylic acid tert-butyl ester as a white solid (3.02 g, quantitative yield). LCMS RT=4.76 min, [M+H]+=465/467. 1H NMR 400 MHz (DMSO-d6) δ: 8.62 (1H, s), 8.40 (1H, d, J=8.59 Hz), 7.69 (1H, s), 7.23-7.22 (2H, m), 4.81 (1H, s), 4.44 (4H, s), 1.32 (9H, s), 1.13 (6H, d, J=6.64 Hz)

Aufarbeitung

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. customthe resultant residue partitioned between DCM and water
  3. extractionThe aqueous phase was extracted with DCM (×2) before the combined organic extracts
  4. washwere washed sequentially with 10% citric acid solution, saturated sodium bicarbonate solution
  5. dry with materialbrine, dried (Na2SO4)
  6. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-99c76e52a25340c8a9b4e34f5cd93165
Quelldatensatz
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08343955B2

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