共查询到20条相似文献,搜索用时 140 毫秒
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研究了3-(1H-苯并三唑-1-亚甲基)-4-氨基-5-巯基-1,2,4-三唑与取代苯甲酸在三氯氧磷催化下的反应,制得10种新的3-(1H-苯并三唑-1-亚甲基)-1,2,4.三唑并[3,4-b]-1,3,4-噻二唑,通过元素分析、IR、 ̄1NMR和MS确证了它们的结构并讨论了其波谱性质。 相似文献
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含胺配体过渡金属络正离子与[Ni(cdc)_2]~(2-)的加合物的合成和物理性质李金山,谢斌(南开大学元素有机化学研究所,天津,300071)(四川轻化工学院基础部)关键词N-氰基亚胺基二硫代甲酸根,加合物,光谱,配位1,1-二硫醇和1,2-二硫醇的... 相似文献
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研究了1-芳基-4-乙氧羰基-5-氨基-1,2,3-连三唑(1)同甲酰胺、异氰酸磺酰氯以及内酰亚胺醚等的反应,制得5-H-1-芳基-1,2,3-连三唑[4,5-e]嘧啶-4-酮(2a-c)、5-N-甲基-1-芳基-1,2,3-连三唑[4,5-e]嘧啶-4-酮(3a-c)、1-芳基-4-乙氧羰基-5-脲基-1,2,3-连三唑(4a,b)、5-H-1-芳基-1,2,3-连三唑[4,5-e]嘧啶-4,6-二酮(5_(a,b))、1-苯基-1,2,3-连三唑[4,5-e]哌啶[1,2-b]嘧啶-4-酮(6a)、1-苯基-1,2,3-连三唑[4,5-e]氢化吖辛因[1,2-b]嘧啶-4-酮(7a),并经元素分析、红外、核磁共振以及质谱等方法确认了它们的结构,初步筛选了其代表特的生物活性. 相似文献
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3-嘧啶胺基或三嗪胺基甲酰基-4-羟基-2H-1,2-苯并噻嗪-1,1-二氧化物的合成及活性 总被引:1,自引:0,他引:1
通过3-乙氧甲酰基-4-羟基-2-氢(甲基)-2H-1,2-苯并噻嗪-1,1-二氧化物与取代嘧啶胺或均三嗪胺的胺解反应,合成了标题化合物。生物活性测定结果表明多数化合物具有较好的除草活性,部分化合物显示好的植物生长调节活性和抗炎免疫活性。 相似文献
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N—[1-(2-吡咯烷酮基)甲基]丙烯酰胺类的聚合及其水凝胶 总被引:1,自引:0,他引:1
N- [( 2-oxo - 1 -pyrrolidinyl) methyl] acrylamide (PyMAM ) andN- [(2 - oxo - 1- pyrrolidinyl ) methyl] methaGrylamide (PyMMAM ) weresynthesized by reaction of N--hydroxymethyl pyrrolidone with correspondingacrylamide. The polymerization of PyMAM was caacced out in aqueous solution,using N, N - dimethylaminoethyl methacrylate (DMAEMA) - potassiumpersulfate (KPS) as initiation system. A superhigh molecular weight of polymewas obtained. A slightly cross- linked hydrogel prepared from these monomers displayed high equilibrium water content (EWC)up to 97.4%. 相似文献
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用KBH_4,CaCl_2为还原剂使D及L缬氨酸甲酯还原得到光学活性产物R-3-甲基-2-氨基丁醇(2a)及S-3-甲基-2-氨基丁醇(2b)。2a,2b同CS_2在KOH存在下反应得到(R)-4-异丙基四氢噻唑-2-硫酮(3a)及(S)-4-异丙基四氢噻唑-2-硫酮(3b)。肉桂酰氯分别同3a及3b在Et_3N存在下反应得到N-肉桂酰(R)-4-异丙基四氢噻唑-2-硫酮(4a)及N-肉桂酰(S)-4-异丙基四氢噻唑-2-硫酮(4b)。用半经验的量子化学PM3方法研究了反应物和产物的电子结构,得到了产物的最优构型和电荷键序分布以及反应焓变。 相似文献
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在对甲苯磷酸存在下,采用1,1-二[4-(N,N-二取代氨基)苯基]乙烯(3)和四氯苯酐在乙酸酐溶液中的缩合反应合成了3,3-二{2,2-二[4-(N,N-二取代氨基)苯基]乙烯基}-4,5,6,7-四氯-2-苯并[c]呋喃酮(4),产率89~93%。3由4,4'-二(N,N-二取代氨基)二苯甲酮(1)与甲基碘化镁进行Grignard反应的产物经水解再脱水制得,产率85%~88.5%(以1为基准)。 相似文献
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Methyl 2[2-(3- methyl)indolyl]acetate (1a), on treatment with sodium hydride and methyl formate, gives methyl (Z) - 2[2 - (3 - methyl)indolyl] - 3 - hydroxyacrylate (2a), which is in tautomeric solvent-dependent equilibrium with methyl 2[2 - (3 - methyl)indolinylidene] - 3 - oxopropanoate (6). On reaction with phosphoryl chloride in dimethyl formamide, (1a) yields methyl (Z) - 2[2 - (3 - methyl)indolyl] - 3 - N,N - dimethylaminoacrylate (9) as expected, together with a more complex product derived from (9). 相似文献
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Changyu Ren Chuanfu Chen Fu Xi 《Journal of polymer science. Part A, Polymer chemistry》1998,36(12):2127-2133
Optically active poly[triphenylmethyl methacrylate-co-phenyl[bis(2-pyridyl)]methyl methacrylate] (poly[TrMA-co-PB2PyMA], poly[diphenyl(2-pyridyl)methyl methacrylate-co-phenyl[bis(2-pyridyl)]methyl methacrylate] (poly[D2PyMA-co-PB2PyMA]), and poly[triphenylmethyl methacrylate-co-diphenyl(2-pyridyl)-methyl methacrylate] (poly[TrMA-co-D2PyMA]) were prepared by helix-sense-selective copolymerization with complexes of organolithium with (−)-sparteine [(−)Sp],(S, S)-(+)- and (R, R)-(−)-2,3-dimethoxy-1,4-bis(dimethylamino)butane [(+)- and (−)DDB], and (S)-(+)-2-(1-pyrrolidinylmethyl)pyridine [(+)PMP] as anionic initiators in toluene at low temperature. The copolymers obtained with (−)Sp and (+)DDB or (−)DDB complexes of organolithium showed low optical activity, but to [(+)PMP] complex with N,N′-diphenyleneamine monolithium amide [(+)PMP–DPEDA–Li)] was effective in synthesizing copolymers of high optical rotation ([α] about +320 to + 370°) which were comparable to those of corresponding homopolymers with one-handed helical structure. The optical rotations of poly[TrMA-co-PB2PyMA] and poly[TrMA-co-D2PyMA] were much more stable than that of poly(D2PyMA) or poly(PB2PyMA) in a solution of CHCl3–2,2,2-trifluoroethanol (10 : 1, v/v) at 25°C, but optical rotation of poly[D2PyMA-co-PB2PyMA] slowly decreased with time in the same conditions. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2127–2133, 1998 相似文献
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1 INTRODUCTION The sulfonylurea herbicides are characterized by broad-spectrum weed control at very low use rates (c.2~75g ai ha-1), good crop selectivity and very low acute and chronic animal toxicity (acute oral LD50 to rat >4000 mg/kg)[1]. They are e… 相似文献
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V. Yu. Tyutin N. D. Chkanikov V. S. Shklyaev Yu. V. Shklyaev A. F. Kolomiets A. V. Fokin 《Russian Chemical Bulletin》1992,41(8):1474-1476
1,3,3-Trimethyl-3,4-dihydroisoquinolines react with 1,1-dicyano-2,2-bis(trifluoromethyl)ethylene to give 4-amino-6,6-dimethyl-2,2-bis(trifluoromethyl)-3-cyano-6,7-dihydro-2H-benzo[a]quinolizines. The reaction of 3,3-dimethyl-1-cyanomethylidene-1,2,3,4-tetrahydroisoquinoline and the methyl ester of 3,3-dicyano-2-(trifluoromethyl)acrylic acid leads to 5,5-dimethyl-3-oxo-2-(trifluoromethyl)-2-(dicyanomethyl)-2,3,5,6-tetrahydropyrrolo[2,1-a]isoquinoline.A. N. Nesmeyanov Institute of Heteroorganic Compounds, Russian Academy of Sciences, 117813 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 8, pp. 1888–1892, August, 1992. 相似文献
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A direct route for the synthesis of the neutral dichloro complexes [Pt(NS)Cl2], (NS = 2-[(ethylthio)methyl]pyridine and 2-[(phenylthio)methyl]pyridine) in dimethylformamide, which avoids the formation of bis-chelate cations, is reported. 相似文献
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以3-乙基-3-羟甲基氧杂环丁烷为原料,与甲基磺酰氯磺酰化,得到3-乙基-3-甲磺酰基甲基氧杂环丁烷;在碱性条件下,以PEG600作相转移催化剂,用3-乙基-3-甲磺酰基甲基氧杂环丁烷与乙二醇醚化得到2-[(3-乙基-3-氧杂环丁基)甲氧基]乙醇;然后与甲基丙烯酸甲酯进行酯交换得到目的产物2-[(3-乙基-3-氧杂环丁烷)甲氧基]甲基丙烯酸乙酯。3-乙基-3-羟甲基氧杂环丁烷与3-溴丙烯反应,生成3-乙基-3-[(2-丙烯-1-基氧基)甲基]氧杂环丁烷,然后在氯铂酸的催化下,与三乙氧基硅烷反应得到3-乙基-3-[[3-(三乙氧基硅)丙氧基]甲基]氧杂环丁烷。产物经红外光谱和核磁共振谱表征得到确证。 相似文献