共查询到18条相似文献,搜索用时 109 毫秒
1.
2.
3.
以吡唑膦亚胺、芳基异氰酸酯和芳基甲酰肼为原料,通过串联氮杂Wittig反应关环合成了12种新型的5-芳甲酰胺基-6-芳胺基-吡唑并[3,4-d]嘧啶-4-酮衍生物(3a~3l),其结构经1H NMR, 13C NMR, IR和HR-MS(ESI)表征。对单双子叶除草活性的初步测试结果发现:部分化合物具有优异的除草活性,特别是浓度为100 mg·L-1时,5-(4-氟苯甲酰胺基)-6-(4-氯苯胺基)-3-甲硫基-1-苯基-1H-吡唑[3,4-d]-嘧啶-4(5H)-酮3i和5-(4-吡啶苯甲酰胺基)-6-(4-氯苯胺基)-3-甲硫基-1-苯基-1H-吡唑[3,4-d]-嘧啶-4 (5H)-酮3k对油菜和稗草的茎和根的抑制率高达100%。 相似文献
4.
以3-碘-1H-吡唑并[3,4-d]嘧啶-4-胺(2)为原料,经过N-烷基化、Suzuki偶联反应得到目标化合物1-异丙基-3-(异丙烯基)-1H-吡唑并[3,4-d]嘧啶-4-胺(1),两步反应总收率57.0 %。产物及中间体结构经1H NMR、13C NMR、ESI-MS以及X-射线单晶衍射进行表征。并对该Suzuki反应条件进行研究,确定最佳条件为:Pd(dppf)Cl2的用量为n (Pd(dppf)Cl2) : n (化合物3) = 0.06 : 1;物料比为n(异丙烯基硼酸): n(化合物3)= 1.6 : 1;反应溶剂为N,N-二甲基甲酰胺;反应温度为100 ℃;反应时间2 h,在最佳反应条件下,该Suzuki偶联反应收率达到68.2 %。体外抗肿瘤活性测试表明,产物(1)对MCF-7、A549、PC-3、HepG2和SGC-7901增殖均有明显的抑制活性,特别抑制MCF-7的IC50值达到10.6 μmol?L-1。 相似文献
5.
6.
含1,3,4-噻二唑环吡唑并[3,4-d]嘧啶类化合物的合成及生物活性 总被引:1,自引:0,他引:1
通过5-氨基-4-氰基-1-苯基吡唑与甲酸发生环合、再经氯化和芳香族亲核取代反应,合成了12种新的含1,3,4-噻二唑环吡唑并[3,4-d]嘧啶类化合物.目标化合物的结构经红外光谱、核磁共振氢谱、质谱和元素分析方法予以确认.初步的生物活性测定试验表明,在50 mg/L浓度下,大部分目标化合物对小麦纹枯病菌(Rhizoctonia cerealis)表现出较好的杀菌活性,其中化合物5b,5d和5j的抑菌率超过90%. 相似文献
7.
用烯基膦亚胺与苯基异氰酸酯、仲胺的串联aza-Wittig反应合成了8个新的2-二烷氨基-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(6a~6h),其结构经1H NMR, MS和元素分析表征.初步生物活性测试结果表明,部分6表现出一定的抑菌活性,其中6f在浓度为5×10-5g·L-1时,对棉花炭疽菌的抑制率达到87%. 相似文献
8.
9.
10.
利用药物设计中的生物活性基团拼接原理,设计合成了13个含吲哚的吡唑并[3,4-d]嘧啶衍生物.目标化合物均经核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)和高分辨质谱仪(HRMS)进行了结构确证.对4株肿瘤细胞(HeLa、MGC-803、MCF-7、BEL-7404)的体外抗增殖活性实验结果表明,目标化合物均表现出一定的抗肿瘤活性,MCF-7、MGC-803肿瘤细胞株敏感度高于HeLa和BEL-7404.其中, 6-[(6-甲氧羰基吲哚-3-基)硫基]-1-苯基-吡唑并[3,4-d]嘧啶-4-酮(5m)表现出较好的体外肿瘤抑制活性,对MCF-7、MGC-80和HeLa细胞的IC50均小于30μmol·L^-1,对MCF-7的IC50值为(4.02±0.92)μmol·L^-1,优于对照药物依托泊苷(10.1±0.62μmol·L^-1)和羟喜树碱(5.93±0.56μmol·L^-1).拓扑异构酶抑制实验结果表明,此类化合物对TopoII有选择性抑制活性,所有化合物对TopoⅡ表现出不同程度抑制活性,对Topo Ⅰ未表现出抑制活性. 相似文献
11.
用邻氨基噻吩腈与乙酰乙酸甲酯为原料,利用串联Aza-Wittig法合成了9个未见文献报道的噻吩并吡啶并嘧啶类化合物,通过IR,1H NMR,EI-MS,元素分析等方法对所合成的化合物进行了结构表征,并初步测定了所合成化合物的杀菌活性.生测结果表明:此类化合物对棉花枯萎(Fusarium oxysporium)、水稻纹枯(Rhizoctonia solani)、小麦赤霉(Gibberella zeae)、苹果轮纹菌(Dothiorella gregaria)、棉花炭疽菌(Colletotrichum gossypii)等5种菌均有一定的抑制活性.其中对苹果轮纹菌抑制活性最好,在浓度为5.0×10-5g/mL时抑制率为31.80%~82.84%. 相似文献
12.
13.
The novel title compound 1-(4-methoxybenzylidene)-2-(1-phenyl-6-trifluoromethyl-1H-pyrazolo[3,4-d]pyrimidin-4-yl)hydrazine monohydrate(C20H15F3N6O·H2O, Mr = 430.40) has been synthesized by a four-step procedure including the cyclization, chlorination, hydrazinolysis and condensation reaction, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to orthorhombic, space group Pbca with a = 8.3779(13), b = 17.607(3), c = 26.774(4) , V = 3949.2(11) 3, Z = 8, Dc = 1.448 g/cm3, μ = 0.117 mm–1, F(000) = 1776, the final R = 0.0553 and wR = 0.1516 for 2354 observed reflections with I 2■(I). X-ray diffraction analysis reveals that the title compound is almost coplanar except for the trifluoromethyl and phenyl moieties. In the crystal packing, the molecules are linked by intermolecular O(1W)–H(1WA)···N(2), O(1W)–H(1WA)···N(4) and N(5)–H(5A)···O(1W) hydrogen bonds via water molecules and stacked through π-π stacking interactions. The preliminary bioassay suggested that the title compound exhibits relatively good antitumor activity against HepG2 and BCG-823. 相似文献
14.
Fifteen novel pyrazolo[3,4-b]-pyrido[4,3-d]-pyrimidine-4-ones (7a–o) were designed and have been successfully synthesized via tandem aza-Wittig and annulation reactions of the corresponding iminophosphorances 5, phenylisocyanate, and substituted phenols in 60–77% isolated yields. Their structures were clearly verified by infrared (IR), 1H NMR, electron impact–mass spectrometry (EI-MS), and elemental analysis. The results of a preliminary bioassay indicated that some compounds possess inhibition activities against the root of Brassica napus (rape) and Echinochloa crusgalli (barnyard grass) at a dosage of 100 mg/L and 10 mg/L. 相似文献
15.
16.
1 INTRODUCTION As purine analogs, pyrzolo[3,4-d]pyrimidines have anti-tumor[1], antibacterial[2] and anti-leukemic activities[3,4]. Few of these, however, have been studied for pesticidal activity. It is reported that some substituted pyrzolo[3,4-d]pyrimidines have good fungicidal activity[5~7]. These prompted us to study pyrazolo[3,4-d]pyrimidines analogs further. It is shown that two possible products can be formed in the reaction of ethyl N-pyrazolylformimidate with alkylamines as sh… 相似文献
17.
通过氮杂Wittig反应合成了一系列结构新颖的未见文献报道的取代四氢苯并[4',5']噻吩并[3',2':5,6]吡啶并[4,3-d]嘧啶-4(3H)-酮化合物6, 产物的结构通过核磁共振氢谱、质谱、红外光谱、元素分析的确证. 为进一步了解此类化合物的结构, 对化合物6c进行了X射线单晶衍射. 初步杀菌活性测定结果表明, 该类化合物具有较好的杀菌活性和选择性. 如6f在50 mg/L浓度时, 对黄瓜灰霉菌的抑制率为98%. 相似文献
18.
A new synthesis of 4-methoxy (or ethoxy)-1,6-diaryl-1H-pyrazolo[3,4-d]pyrimidine derivatives is described. An efficient one-step methodology for the title compounds was achieved by using 5-amino-1-aryl-1H-pyrazole-4-carbonitriles with arylaldehydes in CH3OH or C2H5OH and NaOH at 60 °C. The new compounds were obtained in moderate to good yields as stable solids and easily purified by filtration. 相似文献