A novel derivaltive thiophene,2,5 nis(2 amino ehtoxymethyl) thiophene(B) was synthesized.It was characterized by elemental analysis,IR,and 1H NMR.The preliminary bioactivity study showed that compound(B) exhibited hig...A novel derivaltive thiophene,2,5 nis(2 amino ehtoxymethyl) thiophene(B) was synthesized.It was characterized by elemental analysis,IR,and 1H NMR.The preliminary bioactivity study showed that compound(B) exhibited higher antibacterial activity.展开更多
The title compound 3 was synthesized from diethylguanidine nitrate(2) obtained from diethylamine, CaCN2 and HNO3. The mixture consisted of 0.5 mol 2, 0.55 mol acetonyl propionate, 3 g benzyltriethylammonium chloride...The title compound 3 was synthesized from diethylguanidine nitrate(2) obtained from diethylamine, CaCN2 and HNO3. The mixture consisted of 0.5 mol 2, 0.55 mol acetonyl propionate, 3 g benzyltriethylammonium chloride, and 44 g NaOH was refluxed for 4 hours to give 85 g 3, in yield 94.6%.展开更多
文摘本文拟建立二乙酰一肟-氨基硫脲测定游泳池中尿素的方法,从波长的选择、酸度的条件、试剂的加入量、温度的条件、加热时间来寻求最佳条件。结果表明:实验最理想条件是在酸性条件,线性方程结果良好,r=0.999 6,检测波长为480 nm,混合酸溶液加入量为5.00 m L,二乙酰一肟-氨基硫脲溶液加入量为2 m L,加热时间为20 min,线性范围为0~10 mg/L。该方法检测结果良好,可用于游泳池中的尿素测定。
文摘The title compound 3 was synthesized from diethylguanidine nitrate(2) obtained from diethylamine, CaCN2 and HNO3. The mixture consisted of 0.5 mol 2, 0.55 mol acetonyl propionate, 3 g benzyltriethylammonium chloride, and 44 g NaOH was refluxed for 4 hours to give 85 g 3, in yield 94.6%.