With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59669-59-9,3-(tert-Butyl)isoxazol-5-amine,as a common compound, the synthetic route is as follows.,59669-59-9
To a solution of the starting pyrazole amine (1 eq) in EtOAc were added 2,2,2-trichloroethylchloroformate (1.1 eq) and saturated NaHCO3 (2-3 eq) at 0¡ã C. After stirring for 3 h at RT, the layers were separated and the aqueous layer extracted with EtOAc. The combined organic extracts were washed with brine, dried (Na2SO4) and concentrated under vacuum to yield the crude TROC carbamate of the pyrazole amine.Example 2To a solution of 2,2,2-trichloroethyl 3-tert-butylisoxazol-5-ylcarbamate (0.080 g, 0.25 mmol), formed via General method B from Example B1, in dioxane (3 mL) was added Example A2 (70 mg, 0.25 mmol) and 1-methylpyrrolidine (22 mg, 0.25 mmol). The reaction mixture was heated overnight at 65¡ã C. The reaction mixture cooled to RT, concentrated in vacuo, DCM (2 mL) was added and the slurry was stirred for 1 hour. The solid was filtered and air dried to obtain 1-(4-(2-(1H-1,2,4-triazol-1-yl)pyridin-4-yloxy)-2-fluorophenyl)-3-(3-tert-butylisoxazol-5-yl)urea. 1H NMR (400 MHz, DMSO-d6): delta 10.3 (s, 1H), 9.56 (s, 1H), 8.70 (s, 1H), 8.34 (s, 1H), 8.29 (d, J=6.0 Hz, 1H), 8.03 (t, J=9.2 Hz, 1H), 7.68 (dd, J=2.0, and 5.6 Hz, 1H), 7.57 (d, J=1.2 Hz, 1H), 7.26 (dd, J=2.8, and 12.0 Hz, 1H), 7.03 (m, 1H), 6.05 (s, 1H), 1.24 (s, 9H); MS (ESI) m/z: 438.1 (M+H+).
59669-59-9 3-(tert-Butyl)isoxazol-5-amine 2095694, aIsoxazoles compound, is more and more widely used in various.
Reference£º
Patent; Deciphera Pharmaceuticals, LLC; US2008/261961; (2008); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem