4-溴-2-(溴甲基)苯甲醛是合成1,2-二氢酞嗪化合物的重要中间体。以4-溴-2-甲基苯腈为原料,通过溴代、还原得两步反应得到目标化合物4-溴-2-(溴甲基)苯甲醛。确定了溴代反应最佳条件:N-溴代丁二酰亚胺(24.0mmol)、过氧苯甲酰(4.0mmol),...4-溴-2-(溴甲基)苯甲醛是合成1,2-二氢酞嗪化合物的重要中间体。以4-溴-2-甲基苯腈为原料,通过溴代、还原得两步反应得到目标化合物4-溴-2-(溴甲基)苯甲醛。确定了溴代反应最佳条件:N-溴代丁二酰亚胺(24.0mmol)、过氧苯甲酰(4.0mmol),反应体系在CCl4中回流反应8h。还原反应最佳条件:二异丁基氢化铝(DIBAL-H)(12.0mmol),反应溶剂二氯甲烷,室温反应3h。两步反应总收率85.4%,产物及中间体结构通过1 H NMR、13 C NMR和电喷雾电离质谱(ESI-MS)进行了表征。展开更多
2-Bromo-4-methylphenol was synthesized from 4-methylphenol by oxidative bromination at the low temperature,with a yield of 93%.The product was characterized by IR and （）1H NMR spectroscopy.The optimum conditions of ...2-Bromo-4-methylphenol was synthesized from 4-methylphenol by oxidative bromination at the low temperature,with a yield of 93%.The product was characterized by IR and （）1H NMR spectroscopy.The optimum conditions of the reaction were:reaction temperature was-5～-10℃,the mol ratio of C7H8O:H2O2 was 1:0.85,reaction time was 4h and agitation rate was 1000 r/min.展开更多
6-(bromomethyl)-2-methylquinazolin-4(3H)-one is the important intermediate which is first-line drugs for treating colon and rectal cancers.In order to investigate the Raltitrexed better,to optimizeby production method...6-(bromomethyl)-2-methylquinazolin-4(3H)-one is the important intermediate which is first-line drugs for treating colon and rectal cancers.In order to investigate the Raltitrexed better,to optimizeby production method,we designed a synthetic route based related literature by cycling,ammoniation and bromination.The process provided high yield,synthetic methodology.The yield of 6-(bromomethyl)-2-methylquinazolin-4(3H)-one was up to 64.8%展开更多
文摘4-溴-2-(溴甲基)苯甲醛是合成1,2-二氢酞嗪化合物的重要中间体。以4-溴-2-甲基苯腈为原料,通过溴代、还原得两步反应得到目标化合物4-溴-2-(溴甲基)苯甲醛。确定了溴代反应最佳条件:N-溴代丁二酰亚胺(24.0mmol)、过氧苯甲酰(4.0mmol),反应体系在CCl4中回流反应8h。还原反应最佳条件:二异丁基氢化铝(DIBAL-H)(12.0mmol),反应溶剂二氯甲烷,室温反应3h。两步反应总收率85.4%,产物及中间体结构通过1 H NMR、13 C NMR和电喷雾电离质谱(ESI-MS)进行了表征。
文摘2-Bromo-4-methylphenol was synthesized from 4-methylphenol by oxidative bromination at the low temperature,with a yield of 93%.The product was characterized by IR and （）1H NMR spectroscopy.The optimum conditions of the reaction were:reaction temperature was-5～-10℃,the mol ratio of C7H8O:H2O2 was 1:0.85,reaction time was 4h and agitation rate was 1000 r/min.
文摘6-(bromomethyl)-2-methylquinazolin-4(3H)-one is the important intermediate which is first-line drugs for treating colon and rectal cancers.In order to investigate the Raltitrexed better,to optimizeby production method,we designed a synthetic route based related literature by cycling,ammoniation and bromination.The process provided high yield,synthetic methodology.The yield of 6-(bromomethyl)-2-methylquinazolin-4(3H)-one was up to 64.8%
