中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-chloro-6-methyl-2-(thien-2'-yl)pyrimidine | 83726-83-4 | C9H7ClN2S | 210.687 |
The condensation of 3-aminocrotonamide with ethyl pyridine-2-carboxylate or a related ester gave 6-methylpyrimidin-4(3H)-ones, each bearing at its 2-position a pyridin-2'-yl, pyridin-3'-yl, pyridin- 4'-yl, furan-2'-yl, furan-3'-yl, thien-2'-yl or pyrazin-2'-yl substituent. Of these, the pyridinyl derivatives (1a), (2a) and (3a) were converted into their 4-chloro analogues and thence by nucleophilic displacement into the corresponding β-dimethylaminoethylthio, β-dimethylaminoethylamino, β-dimethylaminoethoxy and γ-dimethylaminopropylamino derivatives. The activities of these compounds as amplifiers of phleomycin against Escherichia coli are reported.
2-Chloro-4-(thien-2'-yl)pyrimidine (2a) and its thiazol-2'-yl analogue (2d) are prepared by condensation of 2-chloropyrimidine with thien-2-yl- and thiazol-2-yl-lithium, followed by oxidation of the dihydro intermediates. 4-Chloro-6-methyl-2-(thien-2'-yl)pyrimidine (3b),its 2-(2',4'-dimethylthiazol-5'-yl) analogue (3f) and the 2-(2'-methylthiazol-4'-yl) analogue (4b) are made from the corresponding pyrimidinones, which are available by primary synthesis. Each chloro compound is converted by nucleophilic displacement into its β-dimethylaminoethylamino and β-dimethylaminoethylthio derivatives, for which activities as amplifiers of phleomycin are reported and discussed.