AbstractPyrano[3,2-b]pyranones are prepared in good yields from three-component coupling of kojic acid, ethylcyanoacetate, and benzaldehydes in aqueous K2CO3. The synthetic compounds exert moderate activity against both Gram positive and Gram negative bacteria and their effectiveness is higher against Bacillus subtilis. Graphical abstract
摘要由曲酸,氰基乙酸乙酯和苯甲醛在K 2 CO 3水溶液中的三组分偶联可高产率制备吡喃并[3,2- b ]吡喃酮。合成的化合物对革兰氏阳性和革兰阴性菌均具有中等活性,对枯草芽孢杆菌的有效性更高。 图形概要