以自制2-氨基-4-甲基-5-（1H-1,2,4-三唑-1-基）-噻吩-3-甲酸乙酯为起始原料制得膦亚胺,膦亚胺与苯基异氰酸酯作用得到碳二亚胺,在碳酸钾的催化下,碳二亚胺与酚反应得到4个新型的2-芳氧基-3-苯基-5-甲基-6-（1H-1,2,4-三唑-1-基）噻吩并...以自制2-氨基-4-甲基-5-（1H-1,2,4-三唑-1-基）-噻吩-3-甲酸乙酯为起始原料制得膦亚胺,膦亚胺与苯基异氰酸酯作用得到碳二亚胺,在碳酸钾的催化下,碳二亚胺与酚反应得到4个新型的2-芳氧基-3-苯基-5-甲基-6-（1H-1,2,4-三唑-1-基）噻吩并[2,3-d]嘧啶-4（3H）-酮衍生物（3a-3d）,收率为70%~86%,通过1 H NMR、MS和元素分析等方法对合成化合物进行了结构表征,并初步测定了合成化合物的生物活性。结果表明,目标化合物对常见农作物部分菌体均表现出一定的抑菌活性,其中以2-萘氧基-3-苯基-5-甲基-6-（1H-1,2,4-三唑-1-基）噻吩并[2,3-d]嘧啶-4（3H）-酮活性最好,在浓度为5×10-5g/L时,对苹果轮纹菌的抑制率达到80%。展开更多
相关原料利用Gewald反应生成噻吩2,产物同PPH3、C2Cl6、Et3N作用得到膦亚胺3,对氟苯基异氰酸酯与3作用得到碳二亚胺4,4与甲基苯基胺反应得到一种新物质2-(甲基,苯基)氨基-3-对氟苯基-5-甲基-6(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(...相关原料利用Gewald反应生成噻吩2,产物同PPH3、C2Cl6、Et3N作用得到膦亚胺3,对氟苯基异氰酸酯与3作用得到碳二亚胺4,4与甲基苯基胺反应得到一种新物质2-(甲基,苯基)氨基-3-对氟苯基-5-甲基-6(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮5.其结构经1 H NMR,MS和元素分析表征.生物活性测试表明,此种含氟类衍生物对农作物菌体有较强的抑制作用,它对棉花枯萎菌达到90%的抑制率,对其它五种作物病菌也达55%以上的抑制率.展开更多
3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free...3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free conditions at 90℃.Effects of molar ratio of reactants,amount of catalyst,and reaction temperature on the yields of 3,4-dihydropyrimidin-2-(1H)-ones were investigated.The results showed that at the condition of naldehyde∶n1,3-dicarbonyl compounds∶nurea(or thiourea)=1∶1.2∶1.5,1 mol% catalyst(molar percent of aldehyde),2.0 h at 90℃,the yields of products were 51-96%.After reaction,the catalyst could be reused for four times without distinct loss of catalytic activity.展开更多
以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%...以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%;最后以正丙醇为溶剂,450 W微波辐射7 m in条件下,成环得到5-氨基-噻唑[4,5-d]嘧啶-2(3H)-酮(Ⅲ),产率80.5%。反应总产率为63.9%。合成产物与中间体的结构经1HNMR,MS和元素分析确认。展开更多
文摘以自制2-氨基-4-甲基-5-（1H-1,2,4-三唑-1-基）-噻吩-3-甲酸乙酯为起始原料制得膦亚胺,膦亚胺与苯基异氰酸酯作用得到碳二亚胺,在碳酸钾的催化下,碳二亚胺与酚反应得到4个新型的2-芳氧基-3-苯基-5-甲基-6-（1H-1,2,4-三唑-1-基）噻吩并[2,3-d]嘧啶-4（3H）-酮衍生物（3a-3d）,收率为70%~86%,通过1 H NMR、MS和元素分析等方法对合成化合物进行了结构表征,并初步测定了合成化合物的生物活性。结果表明,目标化合物对常见农作物部分菌体均表现出一定的抑菌活性,其中以2-萘氧基-3-苯基-5-甲基-6-（1H-1,2,4-三唑-1-基）噻吩并[2,3-d]嘧啶-4（3H）-酮活性最好,在浓度为5×10-5g/L时,对苹果轮纹菌的抑制率达到80%。
文摘相关原料利用Gewald反应生成噻吩2,产物同PPH3、C2Cl6、Et3N作用得到膦亚胺3,对氟苯基异氰酸酯与3作用得到碳二亚胺4,4与甲基苯基胺反应得到一种新物质2-(甲基,苯基)氨基-3-对氟苯基-5-甲基-6(1H-1,2,4-三唑-1-基)-噻吩并[2,3-d]嘧啶-4(3H)-酮5.其结构经1 H NMR,MS和元素分析表征.生物活性测试表明,此种含氟类衍生物对农作物菌体有较强的抑制作用,它对棉花枯萎菌达到90%的抑制率,对其它五种作物病菌也达55%以上的抑制率.
文摘3,4-Dihydropyrimidin-2-(1H)-ones were synthesized in high yields by a one-pot cyclocondensation of aldehyde,1,3-dicarbonyl compound,and urea or thiourea using copper o-toluenesulfonate as a catalyst under solvent-free conditions at 90℃.Effects of molar ratio of reactants,amount of catalyst,and reaction temperature on the yields of 3,4-dihydropyrimidin-2-(1H)-ones were investigated.The results showed that at the condition of naldehyde∶n1,3-dicarbonyl compounds∶nurea(or thiourea)=1∶1.2∶1.5,1 mol% catalyst(molar percent of aldehyde),2.0 h at 90℃,the yields of products were 51-96%.After reaction,the catalyst could be reused for four times without distinct loss of catalytic activity.
文摘以硫脲和氯乙酸为原料,在无溶剂和350 W微波辐射4 m in条件下,缩合生成中间体2,4-噻唑烷二酮(Ⅰ)产率91.5%;随后在无溶剂和400 W微波辐射5 m in条件下,通过V ilsm e ier甲酰化反应,生成中间体4-氯-5-甲酰基噻唑-2(3H)-酮(Ⅱ),产率86.7%;最后以正丙醇为溶剂,450 W微波辐射7 m in条件下,成环得到5-氨基-噻唑[4,5-d]嘧啶-2(3H)-酮(Ⅲ),产率80.5%。反应总产率为63.9%。合成产物与中间体的结构经1HNMR,MS和元素分析确认。
