Trifluoroacetic acid → 1-[2-methyl-5-(methyloxy)-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]hexahydro-1H-1,4-diazepine

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Reaktionsgleichung

[CH3:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[C:5]([O:11][CH3:12])=[CH:4][C:3]=1[N:13]1[CH2:19][CH2:18][CH2:17][N:16]([C:20](OC(C)(C)C)=O)[CH2:15][CH2:14]1.C(O)(C(F)(F)F)=O.[CH3:34][S:35]([CH:38]=C)(=[O:37])=[O:36]>C(Cl)Cl.O1CCOCC1>[CH3:1][C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[C:5]([O:11][CH3:12])=[CH:4][C:3]=1[N:13]1[CH2:19][CH2:18][CH2:17][N:16]([CH2:20][CH2:34][S:35]([CH3:38])(=[O:37])=[O:36])[CH2:15][CH2:14]1

Komponenten

Reaktionsbedingungen

Temperatur: 30 °C

Versuchsvorschrift

1,1-Dimethylethyl 4-[2-methyl-5-(methyloxy)-4-nitrophenyl]hexahydro-1H-1,4-diazepine-1-carboxylate (0.7 g, 2.0 mmol) was taken up in 20 mL of DCM and treated with 7 mL of TFA. The mixture stirred for 1 h and was then reduced in vacuo. The solids were transferred to a 50 mL sealed tube and taken up in 20 mL of dioxane. TEA (0.58 g, 5.75 mmol) was added followed by ethenyl methyl sulfone (0.51 g, 4.79 mmol). The mixture was heated to 30° C. for 24 h. The solvent was rotovaped down and the crude product was purified by flash chromatography to give the title compound of step B (0.7 g, 1.88 mmol, 98%). 1H NMR (400 MHz, DMSO-d6) δ 7.73 (s, 1H), 6.56 (s, 1H), 3.86 (s, 3H), 3.33-3.42 (m, 4H), 3.26 (t, J=6.68 Hz, 2H), 2.99 (s, 3H), 2.87 (t, J=6.59 Hz, 2H), 2.74-2.81 (m, 2H), 2.67-2.74 (m, 2H), 2.20 (s, 3H), 1.81-1.89 (m, 2H).

Aufarbeitung

customsealed tube
customthe crude product was purified by flash chromatography

Quellen und Nachweise

ORD-Eintrag: ord-09d4525b81ab43de84b627e64aa38050
Quelldatensatz: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08093239B2

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