[NH2:1][C:2]1[CH:16]=[CH:15][CH:14]=[CH:13][C:3]=1[CH2:4][CH2:5][CH:6]1[CH2:11][CH2:10][CH2:9][CH2:8][N:7]1[CH3:12].[N:17]1[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=1[C:23](OCC)=[O:24].[H-].[Na+].O>CS(C)=O>[CH3:12][N:7]1[CH2:8][CH2:9][CH2:10][CH2:11][CH:6]1[CH2:5][CH2:4][C:3]1[CH:13]=[CH:14][CH:15]=[CH:16][C:2]=1[NH:1][C:23](=[O:24])[C:18]1[CH:19]=[CH:20][CH:21]=[CH:22][N:17]=1A solution of 2-(o-aminophenethyl)-1-methylpiperidine (8.0 g., 0.037 mole) and ethyl picolinate (5.5 g., 0.037 mole) in DMSO (20 ml.) is treated with NaH (57%) in oil (1.6 g., 0.037 mole) with intermittent cooling to moderate the resulting vigorous reaction. After 2 hr., the mixture is poured into 150 ml. of H2O and the product isolated according to the procedure of Example 25. Crystallizations from isopropyl ether affords 5.9 (50%) of analytically pure 2'-[2-(1-methyl-2-piperidyl)-ethyl]picolinanilide, m.p. 65.5°-67° C. (corr.).
読み込み中…
