[CH3:1][C:2]1[N:6]=[C:5]([CH2:7][C:8](=[O:10])[CH3:9])[O:4][N:3]=1.C(O[CH:16](N(C)C)[N:17]([CH3:19])[CH3:18])(C)(C)C>>[CH3:16][N:17]([CH3:19])[CH:18]=[C:7]([C:5]1[O:4][N:3]=[C:2]([CH3:1])[N:6]=1)[C:8](=[O:10])[CH3:9]1-(3-Methyl-[1,2,4]oxadiazol-5-yl)-propan-2-one (224 mg, 1.6 mmol) was reacted with tert.-butoxy-bis-(dimethylamino)-methane using in analogous manner the procedure described in example 28a) to give crude title compound (313 mg) as a yellow oil which was used directly in the next step.
Wird geladen…