Sodium Bicarbonate → 3-Cyanomethyl-2-methyl-8-(phenylpropoxy)-imidazo[1,2-a]pyridine

反応式

[NH2:1][C:2]1[C:7]([O:8][CH2:9][CH2:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[CH:6][CH:5]=[CH:4][N:3]=1.Cl[CH:19]([C:23](=O)[CH3:24])[CH2:20][C:21]#[N:22].C(=O)(O)[O-].[Na+]>C(COC)OC>[C:21]([CH2:20][C:19]1[N:3]2[CH:4]=[CH:5][CH:6]=[C:7]([O:8][CH2:9][CH2:10][CH2:11][C:12]3[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=3)[C:2]2=[N:1][C:23]=1[CH3:24])#[N:22]

参加物

実験手順

A mixture of 5.3 g of 2-amino-3-(3-phenylpropoxy)pyridine, 3.2 g of 3-chloro-4-oxopentanonitrile, 2.0 g sodium bicarbonate, and 50 ml dimethoxyethane was heated at reflux for 24 hrs., then stirred at room temperature 66 hrs. the solvent was removed in vacuo, the brown residue was taken up in 100 ml methylene chloride, filtered, dried over potassium carbonate and evaporated in vacuo to leave a brown gum residue. The residue was chromatographed on silica gel using first chloroform, then switching to 1:1 chloroform/ethyl acetate. The early eluates were combinedand evaporated and the resultant residue crystallized from isopropyl/ether to give the title compound (m.p. 143°-145° C.).