Hydrochloric Acid → (3-Cyclopropyl-1,2-oxazol-5-yl)methanamine
Reaction equation
C(OC([NH:8][CH2:9][C:10]1[O:14][N:13]=[C:12]([CH:15]2[CH2:17][CH2:16]2)[CH:11]=1)=O)(C)(C)C.Cl>CO>[NH2:8][CH2:9][C:10]1[O:14][N:13]=[C:12]([CH:15]2[CH2:17][CH2:16]2)[CH:11]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Crude 5-(tert-butoxycarbonylaminomethyl)-3-cyclopropylisoxazole (Method 3) (37.4 g, 0.157 mol) and 3M hydrochloric acid (80 ml) in methanol (100 ml) was heated at 50° C. for 2 hours. The methanol was removed by evaporation and aqueous residue washed with DCM. The aqueous layer was adjusted to pH 12 by careful addition of 40% aqueous sodium hydroxide solution and then extracted with DCM (×4). The extracts were combined, washed with brine, then dried (Na2SO4) and the volatiles removed by evaporation to give the title compound (11.5 g, 53%) as oil.