dihydropyrimidinones derivatives were synthesized in high yields by one pot three component Biginelli condensation from aldehyde, β keto ester and urea in ethanol,while cobalt chloride hexahydrate was used as a catal...dihydropyrimidinones derivatives were synthesized in high yields by one pot three component Biginelli condensation from aldehyde, β keto ester and urea in ethanol,while cobalt chloride hexahydrate was used as a catalyst.This modified Biginellis reaction not only makes the reaction period short,the operation simple,but also gives high yields.展开更多
Six title compounds were synthesized by the reaction of salicylic acid and 4 substituted phenylenediamine in the presence of pyridine and POCl 3 by microwave irradiation.The reactions took place easily with good yields.
文摘dihydropyrimidinones derivatives were synthesized in high yields by one pot three component Biginelli condensation from aldehyde, β keto ester and urea in ethanol,while cobalt chloride hexahydrate was used as a catalyst.This modified Biginellis reaction not only makes the reaction period short,the operation simple,but also gives high yields.
文摘Six title compounds were synthesized by the reaction of salicylic acid and 4 substituted phenylenediamine in the presence of pyridine and POCl 3 by microwave irradiation.The reactions took place easily with good yields.
