共查询到19条相似文献,搜索用时 78 毫秒
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The tri(o-chlorobenzyl)tin ester of 2-indolylcarboxylic acid has been synthesized and characterized by elemental analysis, IR and 1H NMR. The crystal structure has been determined by X-ray single crystal diffraction. The crystal belongs to triclinic with space group P1, a=1.020 0(16) nm, b=1.125 9(18) nm, c=1.321(2) nm, α=83.10(2)°, β=67.597(18)°, γ=84.83(2)°, Z=2, V=1.391(4) nm3, Dx=1.565 Mg·m-3, μ=1.235 mm-1, F(000)=656, R=0.049 2, wR=0.131 4. In this compound, the central tin atom is rendered four-coordinated in a tetrahedral structure. The resulting structure is a monomer containing Sn-O bond length of 0.205 4(4) nm. CCDC: 236286. 相似文献
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吲哚-3-甲酸是一种重要的有机中间体,被广泛应用于医药与农药的合成.以取代邻硝基甲苯为原料,与N,N-二甲基甲酰胺二甲基缩醛(DMFDMA)反应制得取代2-硝基-β-二甲氨基苯乙烯,再经铁粉和冰乙酸还原环合生成取代吲哚,取代吲哚与三氟乙酸酐经酰化、碱性条件下水解制得5种取代吲哚-3-甲酸类化合物,该合成方法操作简单,条件温和,收率较高. 相似文献
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长链双吲哚啉螺苯并吡喃的合成 总被引:1,自引:1,他引:1
吲哚啉螺吡喃是一类重要光(热)致变色化合物,在现代技术和日用工业中已有应用。70年代以来人们已制得各种类型的双螺吡喃,但由于溶解性能较差等原因使其应用开发受到限制。向母体分子中引入长链烷基是改善与树 相似文献
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Fischer吲哚合成法的研究进展 总被引:10,自引:0,他引:10
吲哚及其衍生物具有某些生物活性, 其合成方法很多. 其中Fischer吲哚合成是最便捷和经济的合成方法, 应用最多. 对此法近十年来的合成工艺进行了综述和评价. 相似文献
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A novel 6-acetylpyridine-2-carboxylic acid (4) was obtained occasionally during the synthesis of asymmetric ethyl 6-acetylpyridine-2-carboxylate (3) from 2,6-dipiclinic acid (1). Compounds 3 and 4 could transform mutually under some specific conditions. Two reactions of distinctive types occurred when they reacted with the aromatic amines as precursors, due to different functional groups on the 2-position of pyridine in the molecules of 3 and 4: one was Schiff base condensation and the other was an amidation reaction. From the latter reaction, two series of new compounds, pyridine carboxamides (5a–d) and pyridine tert-carboximides (6a–h), resulted. The relevant reaction mechanism is discussed in detail. 相似文献
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本文以5-甲基吡嗪-2-羧酸(Hmpca)同Pb(NO3)2和Sr(NO3)2水热反应得到了2个配合物{[Pb2(mpca)4]·H2O}n (1)和{[Sr2(mpca)4(H2O)2]·H2O}n (2),并用元素分析,FTIR和X-射线单晶结构分析进行了表征。X-射线单晶结构分析表明配合物1和2均属于单斜晶系,空间群分别是P21/n和P21。在配合物1中,Pb(Ⅱ)的配位环境为扭曲的四方锥构型;在配合物2中,每个Sr(Ⅱ)与5个羧基氧,1个水分子和2个氮原子配位形成八配位的多面体构型,配合物1和2均是一维链状结构的化合物。在配合物1中游离的水分子与羧基氧之间的氢键作用将相邻的2条链连接成双链结构。配合物2中配位水和游离水分子与未配位的羧基氧以及配体中的氮原子之间的氢键作用将链连接成二维平面结构。 相似文献
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以玉米叶片为供试材料,建立了同时测定植物体内吲哚-3-乙酸(IAA)及其3种氧化产物吲哚-3-甲醇(ICI)、吲哚-3-甲醛(ICA)、吲哚-3-羧酸(IFA)含量的超高效液相色谱-串联质谱(UPLC-MS/MS)方法。结果表明,该方法对IAA及其3种氧化产物检测的线性、精密度和重复性较好,灵敏度较高,4种化合物的检出限为0.002~1.63μg/kg,定量下限为0.007~5.43μg/kg;方法的加标回收率为89.5%~95.3%,相对标准偏差为2.3%~5.1%。玉米叶片的实际测定结果表明,IAA,ICI,ICA和IFA的含量分别为(196.25±7.10),(26.21±2.13),(18.65±2.02),(13.62±2.06)μg/kg。该方法已成功应用于小麦、豌豆、硬毛刺苞菊叶片的测定,通用性较好。 相似文献
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Syntheses of Boc-protected 4-amino- and 5-amino-pyrrole-2-carboxylic acid methyl esters have been achieved and the structures of these compounds have been fully characterized by detailed NMR studies. 相似文献
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利用非对映异构体盐在溶剂中溶解度的不同,以(1S,2R)-1-氨基-2-茚醇(1)为手性拆分剂,拆分四氢糠酸[(RS)-THFA, (RS)-2]获得高光学纯的(S)-2,其结构经1H NMR, 13C NMR和HPLC确证。探究了不同溶剂量和投料比对拆分效果的影响。结果表明较佳拆分条件为:以4-甲基-2-戊酮(3)作溶剂,n[(RS)-2]: n(1)=2.2 : 1,一次拆分得91.7% ee (S)-2;再以n[91.7% ee (S)-2]: n(1)=6 : 5进行二次拆分得99.0% ee (S)-2。拆分剂的回收率提高至92.0%,同时对拆分母液中的非目标对映体成功地进行消旋化,回收率为89.0%,实现了四氢糠酸的循环拆分。 相似文献
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An efficient, ecofriendly aqueous synthesis of aromatic/aliphatic amines with coumarin-3-carboxylic acid in a one pot reaction in a sealed tube or InCl3/ H2O in open vessel to afford N-phenyl/alkyl-2-quinolinones is achieved. This method provides high yield of products in shorter time, making it a useful process for the synthesis of structurally diversified 2-quinolinones from corresponding coumarins. 相似文献
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Catalyzed by Rhodococcus erythropolis AJ270, a nitrile hydratase and amidase containing microbial whole-cell catalyst, at 10 ℃ and with the use of methanol as a co-solvent, nitrile and amide biotransformations produce 2S-1,4-benzodioxane-2-carboxamide and 2R-1,4-benzodioxane-2-carboxylic acid in high yields with excellent enantioselectivity. 相似文献