For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalys...For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalyst and cheaper than HDTBP,and its yield was 50 5%.The fact that potassium permanganates decomposition hampered its oxidation to organic substrate was discovered,so the reaction should be done in neutral medium.展开更多
1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotiz...1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotization and Sandmeyer reaction.Their structures were characterized by IR,UV,1H NMR and MS.展开更多
文摘For the method of phase transfer catalysis oxidation to synthesize benzoic acid,a series of factors were reviewed in detailed.The catalysis effect of HDTBP was found the best.The yield was 70 1%.BTEA is a good catalyst and cheaper than HDTBP,and its yield was 50 5%.The fact that potassium permanganates decomposition hampered its oxidation to organic substrate was discovered,so the reaction should be done in neutral medium.
文摘1H1,2,4-triazole derivatives,owing to their extensive uses in pharmaceutical synthesis, four 5substituted1H1,2,4triazoles were prepared with 5amino1H1,2,4triazole3carboxylic acid through diazotization and Sandmeyer reaction.Their structures were characterized by IR,UV,1H NMR and MS.
