Tris(2-methoxyphenyl)bismuthane works as both a mild dehydrating agent and a good template for macrocyclic ester synthesis; prolonged heating of the bismuthane with a dicarboxylic acid anhydride and a glycol in toluene under reflux afforded the corresponding macrocyclic 1:1 diester in moderate to good yields, together with a small amount of a macrocyclic 2:2 tetraester.
三(2-
甲氧基苯基)
铋既是温和的脱
水剂,又是大环酯合成的良好模板;将
铋烷与二
羧酸酐和二醇在
甲苯中在回流下长时间加热,以中等至良好的收率得到相应的大环1:1二酯,以及少量的大环2:2四酯。