Cyclopropylacetylene → (6-(5-Cyclopropylisoxazol-3-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methanamine

HRID 40395

Reaktionsgleichung

Cl/[C:2](=[N:21]\[OH:22])/[C:3]1[CH:4]=[CH:5][C:6]2[N:7]([C:9]([CH2:12][NH:13]C(=O)OC(C)(C)C)=[N:10][N:11]=2)[N:8]=1.[C:23]([CH:25]1[CH2:27][CH2:26]1)#[CH:24].C(=O)([O-])O.[K+]>CCOC(C)=O>[CH:25]1([C:23]2[O:22][N:21]=[C:2]([C:3]3[CH:4]=[CH:5][C:6]4[N:7]([C:9]([CH2:12][NH2:13])=[N:10][N:11]=4)[N:8]=3)[CH:24]=2)[CH2:27][CH2:26]1

Komponenten

Reaktionsbedingungen

Temperatur: 60 °C

Versuchsvorschrift

Dissolved (Z)-tert-butyl (6-(chloro(hydroxyimino)methyl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl)methylcarbamate (110 mg, 337 μmol), ethynylcyclopropane (28 μl, 337 μmol), and potassium hydrogencarbonate (67.4 mg, 673 μmol) in 0.3 mL of EtOAc and heated to 60° C. for 12 h to afford the protected intermediate. The solvent was removed by rotary evaporation and the residue was redissolved in dicholoromethane (5 mL) and TFA (2 mL) and stirred for 30 min at room temperature. The solvent was then removed and the residue was redissolved in MeOH. Solid K2CO3 was added and the mixture was stirred for 1 h to free base the title compound. Purified the amine via MPLC (DCM/MeOH+1% NH4OH) to afford the title compound (20 mg, 23% yield).

Aufarbeitung

customto afford the protected intermediate
customThe solvent was removed by rotary evaporation
dissolutionthe residue was redissolved in dicholoromethane (5 mL) and TFA (2 mL)
customThe solvent was then removed
dissolutionthe residue was redissolved in MeOH
additionSolid K2CO3 was added
stirringthe mixture was stirred for 1 h to free base the title compound
customPurified the amine via MPLC (DCM/MeOH+1% NH4OH)

Quellen und Nachweise

ORD-Eintrag: ord-9b2ff99cc9894567a238340229554b83
Quelldatensatz: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08524900B2

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