Reaction of 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-thioxo-1,2-dihydropyridine-3-carbonitrile) (1) with methyl iodide afforded the 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-(methylthio)nicotinonitrile) (2). Th...Reaction of 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-thioxo-1,2-dihydropyridine-3-carbonitrile) (1) with methyl iodide afforded the 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-(methylthio)nicotinonitrile) (2). The reaction of 2 with hydrazine hydrate followed by diazotization reaction af-forded the 1,1’-(1,4-phenylenebis(3-amino-6-methyl-1H-pyrazolo[3,4-b]pyridine-4,5-diyl))bis(e-than-1-one) (3) and 1,1’-(1,4-phenylenebis(3-(chlorodiazenyl)-6-methyl-1H-pyrazolo[3,4-b]-pyridine-4,5-diyl))bis(ethan-1-one) (4) respectively. On the other hand, reaction of 4 with malononitrile, 2-cyanoethanethioamide, ethyl acetoacetate, acetyl acetone, ethyl benzoylacetate, diethylmalonate, ethyl cyanoacetate and phenacylbromide aiming to build up pyrazolotriazine or pyrazole ring on the ring system of 4. Structures of all newly synthesized heterocyclic compounds in the present study were confirmed by considering the data of IR, 1H NMR, mass spectra as well as that of elemental analyses.展开更多
【目的】分析新疆生产建设兵团第一师阿拉尔市库尔勒香梨园梨树腐烂病病原菌的种群分类,通过6对保守基因序列,研究库尔勒香梨腐烂病病原菌序列之间相关性及差异性。【方法】在库尔勒香梨园内采集具有典型症状的腐烂病病样,经科赫氏法则...【目的】分析新疆生产建设兵团第一师阿拉尔市库尔勒香梨园梨树腐烂病病原菌的种群分类,通过6对保守基因序列,研究库尔勒香梨腐烂病病原菌序列之间相关性及差异性。【方法】在库尔勒香梨园内采集具有典型症状的腐烂病病样,经科赫氏法则验证获取腐烂病病原菌纯培养。采用CTAB法提取腐烂病病原菌基因组DNA,通过PCR扩增ITS、β-tubulin、EF-1α、ACT、LSU、RBP2基因并测序,利用分子系统学分析不同基因片段的系统发育关系。【结果】在阿拉尔周边混交园内库尔勒香梨腐烂病菌种为Valsa mali var.pyri(V.ambiens、Valsa mali)。种内差异与地理位置有关,国内与国外梨腐烂病分离株差异较明显。EF-1α、ACT、LSU、RBP2在进化过程中更能够体现种间差异,系统发育树分支多,存在种间差异。【结论】新疆生产建设兵团第一师阿拉尔市库尔勒香梨腐烂病病原菌种群分布和种间差异性,库尔勒香梨园的腐烂病病原菌主要为Valsa mali var.pyri、Valsa sordida。新疆南疆绿洲特色果园种植模式,以杨树等为主防护林最为常见,存在着林果树木腐烂病交叉侵染的可能。展开更多
分别采用氘代吡啶和三甲基膦为探针分子,利用高分辨固体核磁共振技术研究了HZSM-35分子筛与探针分子之间的相互作用以及分子筛的酸性.结果表明,探针分子氘代吡啶能够进入分子筛的十元环孔道和八元环孔道,但需在300℃下长时间吸附才能扩...分别采用氘代吡啶和三甲基膦为探针分子,利用高分辨固体核磁共振技术研究了HZSM-35分子筛与探针分子之间的相互作用以及分子筛的酸性.结果表明,探针分子氘代吡啶能够进入分子筛的十元环孔道和八元环孔道,但需在300℃下长时间吸附才能扩散到八元环开口的孔穴中.吸附氘代吡啶后的1H MAS NMR谱和吸附三甲基膦后的31P MAS NMR谱表明,这两种孔道中均具有两种酸强度不同的B酸位,并且B酸的数量多于L酸的数量.展开更多
文摘Reaction of 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-thioxo-1,2-dihydropyridine-3-carbonitrile) (1) with methyl iodide afforded the 4,4’-(1,4-phenylene)bis(5-acetyl-6-methyl-2-(methylthio)nicotinonitrile) (2). The reaction of 2 with hydrazine hydrate followed by diazotization reaction af-forded the 1,1’-(1,4-phenylenebis(3-amino-6-methyl-1H-pyrazolo[3,4-b]pyridine-4,5-diyl))bis(e-than-1-one) (3) and 1,1’-(1,4-phenylenebis(3-(chlorodiazenyl)-6-methyl-1H-pyrazolo[3,4-b]-pyridine-4,5-diyl))bis(ethan-1-one) (4) respectively. On the other hand, reaction of 4 with malononitrile, 2-cyanoethanethioamide, ethyl acetoacetate, acetyl acetone, ethyl benzoylacetate, diethylmalonate, ethyl cyanoacetate and phenacylbromide aiming to build up pyrazolotriazine or pyrazole ring on the ring system of 4. Structures of all newly synthesized heterocyclic compounds in the present study were confirmed by considering the data of IR, 1H NMR, mass spectra as well as that of elemental analyses.
文摘【目的】分析新疆生产建设兵团第一师阿拉尔市库尔勒香梨园梨树腐烂病病原菌的种群分类,通过6对保守基因序列,研究库尔勒香梨腐烂病病原菌序列之间相关性及差异性。【方法】在库尔勒香梨园内采集具有典型症状的腐烂病病样,经科赫氏法则验证获取腐烂病病原菌纯培养。采用CTAB法提取腐烂病病原菌基因组DNA,通过PCR扩增ITS、β-tubulin、EF-1α、ACT、LSU、RBP2基因并测序,利用分子系统学分析不同基因片段的系统发育关系。【结果】在阿拉尔周边混交园内库尔勒香梨腐烂病菌种为Valsa mali var.pyri(V.ambiens、Valsa mali)。种内差异与地理位置有关,国内与国外梨腐烂病分离株差异较明显。EF-1α、ACT、LSU、RBP2在进化过程中更能够体现种间差异,系统发育树分支多,存在种间差异。【结论】新疆生产建设兵团第一师阿拉尔市库尔勒香梨腐烂病病原菌种群分布和种间差异性,库尔勒香梨园的腐烂病病原菌主要为Valsa mali var.pyri、Valsa sordida。新疆南疆绿洲特色果园种植模式,以杨树等为主防护林最为常见,存在着林果树木腐烂病交叉侵染的可能。
文摘分别采用氘代吡啶和三甲基膦为探针分子,利用高分辨固体核磁共振技术研究了HZSM-35分子筛与探针分子之间的相互作用以及分子筛的酸性.结果表明,探针分子氘代吡啶能够进入分子筛的十元环孔道和八元环孔道,但需在300℃下长时间吸附才能扩散到八元环开口的孔穴中.吸附氘代吡啶后的1H MAS NMR谱和吸附三甲基膦后的31P MAS NMR谱表明,这两种孔道中均具有两种酸强度不同的B酸位,并且B酸的数量多于L酸的数量.
