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
A novel method for synthesis of 2-butyl-5 -chloro-3H-imidazole-4-carbaldehyde 2, a key intermediate of Losartan was reported. The compound 2 was synthesized from starting material dimethyl malonate 6 and n-valeronitri...A novel method for synthesis of 2-butyl-5 -chloro-3H-imidazole-4-carbaldehyde 2, a key intermediate of Losartan was reported. The compound 2 was synthesized from starting material dimethyl malonate 6 and n-valeronitrile 8 by six steps with an overall yield of 40%. The key step including the reaction of compound 5 with POCl3/DMF followed by hydrolysis to give compound 2 with the yield of 68%.展开更多
The title compound ethyl 2-(6-(1,3-dioxo-4,5,6,7-tetrahydro-lH-isoindol-2(3H)- yl)-7-fluoro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl) butanoate 3 was synthesized by the reaction of ethyl 2-(6-amino-7-fluoro-3-ox...The title compound ethyl 2-(6-(1,3-dioxo-4,5,6,7-tetrahydro-lH-isoindol-2(3H)- yl)-7-fluoro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl) butanoate 3 was synthesized by the reaction of ethyl 2-(6-amino-7-fluoro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl) butanoate with 4,5,6,7- tetraydrophthalic anhydride, and its structure was determined by X-ray single-crystal diffraction. The crystal belongs to the monoclinic system, space group P2 1/n with a = 9.3469(2), b = 16.7715(5), c = 13.7153(4) A, β= 104.9680(10)°, μ = 0.107 mm^-1, Mr = 430.42, V= 2077.08(10) ,A3, Z= 4, Dc = 1.376 g/cm3, F(000) = 904, T= 296(2) K, R = 0.0508 and wR = 0.1478.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.
基金supported by Outstanding Youth Foundation of Heilongjiang Province(No.JC200706)
文摘A novel method for synthesis of 2-butyl-5 -chloro-3H-imidazole-4-carbaldehyde 2, a key intermediate of Losartan was reported. The compound 2 was synthesized from starting material dimethyl malonate 6 and n-valeronitrile 8 by six steps with an overall yield of 40%. The key step including the reaction of compound 5 with POCl3/DMF followed by hydrolysis to give compound 2 with the yield of 68%.
基金Supported by the National Natural Science Foundation of China (20872033, 20575019)Natural Science Foundation of Hunan Province (07JJ1003)+1 种基金Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) (KLCBTCMR2008-14)Scientific Research Fund of Science and Technology Department of Hunan Province (No. 2006GK3067)
文摘The title compound ethyl 2-(6-(1,3-dioxo-4,5,6,7-tetrahydro-lH-isoindol-2(3H)- yl)-7-fluoro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl) butanoate 3 was synthesized by the reaction of ethyl 2-(6-amino-7-fluoro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl) butanoate with 4,5,6,7- tetraydrophthalic anhydride, and its structure was determined by X-ray single-crystal diffraction. The crystal belongs to the monoclinic system, space group P2 1/n with a = 9.3469(2), b = 16.7715(5), c = 13.7153(4) A, β= 104.9680(10)°, μ = 0.107 mm^-1, Mr = 430.42, V= 2077.08(10) ,A3, Z= 4, Dc = 1.376 g/cm3, F(000) = 904, T= 296(2) K, R = 0.0508 and wR = 0.1478.