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
Synthesis steps of 4,5 diamino 6 hydroxy 2 mercaptopyrimidine were improved on cyclocondensation of ethyl cyanoacetate with thiourea,nitrosation and reduction to obtain the product in 89% yield with high purity on ind...Synthesis steps of 4,5 diamino 6 hydroxy 2 mercaptopyrimidine were improved on cyclocondensation of ethyl cyanoacetate with thiourea,nitrosation and reduction to obtain the product in 89% yield with high purity on industrial scale.展开更多
对2-甲基嘧啶-4,6-二酮(MPO)制备1,1-二氨基-2,2-二硝基乙烯(FOX-7)过程中的副产物二硝基甲烷进行了回收,经氢氧化钾水溶液中和制得了性质稳定的长针状晶体二硝基甲烷钾盐(KDNM),用KDNM、甲醛、叔丁胺作原料通过Mannich缩合反应制得了1...对2-甲基嘧啶-4,6-二酮(MPO)制备1,1-二氨基-2,2-二硝基乙烯(FOX-7)过程中的副产物二硝基甲烷进行了回收,经氢氧化钾水溶液中和制得了性质稳定的长针状晶体二硝基甲烷钾盐(KDNM),用KDNM、甲醛、叔丁胺作原料通过Mannich缩合反应制得了1,3-二叔丁基-5,5-二硝基六氢嘧啶,通过浓硫酸与浓硝酸的混酸体系硝解1,3-二叔丁基-5,5-二硝基六氢嘧啶制得了1,3,5,5-四硝基六氢嘧啶(DNNC),总产率达到78.9%(以二硝基甲烷钾盐计)。采用1H NMR、红外、质谱对DNNC和中间物的结构进行了表征。研究了p H值、溶剂、温度对Mannich缩合反应的影响以及硝化体系的选择对硝解反应的影响。确立了Mannich缩合反应的最佳工艺条件为:二硝基甲烷钾盐∶甲醛∶叔丁胺的摩尔比为1.0∶3.5∶2.0;10%甲醇水溶液为溶剂,室温下用盐酸调节p H值至8,随后升温至50℃,反应3 h,产率达到85.3%。硝解反应中采用20 m L 98%H_2SO_4与10 m L HNO_3的混酸体系作为硝解体系,产率达到92.5%。展开更多
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%.
文摘Synthesis steps of 4,5 diamino 6 hydroxy 2 mercaptopyrimidine were improved on cyclocondensation of ethyl cyanoacetate with thiourea,nitrosation and reduction to obtain the product in 89% yield with high purity on industrial scale.
文摘对2-甲基嘧啶-4,6-二酮(MPO)制备1,1-二氨基-2,2-二硝基乙烯(FOX-7)过程中的副产物二硝基甲烷进行了回收,经氢氧化钾水溶液中和制得了性质稳定的长针状晶体二硝基甲烷钾盐(KDNM),用KDNM、甲醛、叔丁胺作原料通过Mannich缩合反应制得了1,3-二叔丁基-5,5-二硝基六氢嘧啶,通过浓硫酸与浓硝酸的混酸体系硝解1,3-二叔丁基-5,5-二硝基六氢嘧啶制得了1,3,5,5-四硝基六氢嘧啶(DNNC),总产率达到78.9%(以二硝基甲烷钾盐计)。采用1H NMR、红外、质谱对DNNC和中间物的结构进行了表征。研究了p H值、溶剂、温度对Mannich缩合反应的影响以及硝化体系的选择对硝解反应的影响。确立了Mannich缩合反应的最佳工艺条件为:二硝基甲烷钾盐∶甲醛∶叔丁胺的摩尔比为1.0∶3.5∶2.0;10%甲醇水溶液为溶剂,室温下用盐酸调节p H值至8,随后升温至50℃,反应3 h,产率达到85.3%。硝解反应中采用20 m L 98%H_2SO_4与10 m L HNO_3的混酸体系作为硝解体系,产率达到92.5%。
