| 摘要 |
Title compds. (I)[R1=H, lower alkyl; R2, R3=H, halo, lower alkyl, OH, lower alkoxy, -NO2, etc.; X=-NH-R, -AOR', etc.; R=lower alkyl, alkenyl, etc.; R'=H, lower alkyl, etc. were prepd.. Thus, ZnCl2 in triethylamine was treated with 2,4-penta-2,4-dione in benzene and chlorotrimethylcillane to give [A . [A and diethylacetylene dicarboxylate in toluene was refluxed for 16hr to give [B . [B in THF was treated with NaH, methyliodide, tetra-nbutylammonium chloride and HMPA to give [C . [C in ethanol and NaOH was mixed for 3hr and acidified to give [D . [D and 1,1-carbonyldimidazole in THF was treated with trimethylcyllylazide and toluene to give [E . |
