[CH2:1]([NH:4][CH2:5][CH2:6][CH3:7])[CH2:2][CH3:3].[CH2:8]=[C:9]1[O:13][C:11](=[O:12])[CH2:10]1>CO>[O:13]=[C:9]([CH3:8])[CH2:10][C:11]([N:4]([CH2:5][CH2:6][CH3:7])[CH2:1][CH2:2][CH3:3])=[O:12]A solution of 27.80 g (0.28 mol) N,N-di-n-propylamine was added dropwise to a solution of 20.00 g (0.24) diketene in 100 ml MeOH at 0° C. After stirring for 3 hours at 0° C., no starting material was detected anymore by thin-layer chromatography. The reaction mixture was spun off and the residue was purified by means of column chromatography. 38.05 g of product was obtained as a slightly yellow oil.
불러오는 중…