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喹喔啉类化合物的合成研究进展 总被引:1,自引:0,他引:1
喹喔啉是一种重要的精细化工中间体,广泛用于农药,医药等行业,本文以二羰基,二硫代碳基,环氧化合物,α-羟基酮,α,β-二醇以及α-卤代酮与邻苯二胺为原料,综述了近些年来过渡金属与无过渡金属条件下喹喔啉合成方法的研究进展。报道了化学家们在合成喹喔啉这一领域里的合成方法,并对喹喔啉合成的研究前景进行了展望。 相似文献
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5,7,7—三甲基—5,6,7,8—四氢喹喔啉的合成 总被引:1,自引:0,他引:1
以 3,5,5 三甲基 1,2 环己二酮和乙二胺为主要原料 ,经缩合、脱氢反应 ,合成了 5,7,7 三甲基 5,6 ,7,8 四氢喹喔啉 ,总得率为 2 8.5% 相似文献
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以4-溴苯-1,2-二胺、芳香醛和对甲基磺酰甲基异腈(TOSMIC)为原料,甲苯为反应溶剂,在三乙烯二胺(DABCO)碱性条件下,三组分“一锅法”合成了5种目标化合物6-溴-2-芳基喹喔啉衍生物1a~1e,产物经1H NMR、13C NMR和电喷雾离子源质谱(ESI-MS)表征。其中,6-溴-2-苯基喹喔啉(1a)的结构进一步通过X射线衍射(XRD)确定。并以4-溴苯-1,2-二胺(2)、苯甲醛(3a)和TOSMIC的三组分反应合成6-溴-2-苯基喹喔啉(1a)的反应为模型,研究了影响产物1a收率的主要因素,确定了适宜的反应条件为:n(3a)∶n(TOSMIC)∶n(2)比为1.2∶1.1∶1.0、n(DABCO)∶n(2)=1.2∶1.0、反应温度80℃、反应时间5 h条件下,产物1a收率为56.1%。 相似文献
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Ravindra Chintaman Phadke Dinesh Wamanrao Rangnekar 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1986,36(5):230-235
Synthesis of 2-triazolylthiazolo[4,5-b]quinoxaline derivatives was achieved by diazotisation of 2-aminothiazolo[4,5-b]quinoxaline and its 6-nitro derivative using orthophosphoric acid and sodium nitrite with a trace of nitric acid, coupling with suitable aromatic amines and subsequent cyclisation of the resulting ortho amino azo compounds. Diazotisation of 2,6-diaminothiazolo[4,5-b]quinoxaline with concentrated hydrochloric acid and sodium nitrite and subsequent coupling and cyclisation resulted in the 6-triazolylthiazolo[4,5-b]quinoxaline derivatives. These compounds were applied on polyester as fluorescent disperse dyes. 相似文献
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《Journal of Sulfur Chemistry》2013,34(6):605-615
Derivatives containing the cyclohepta4′,5′thieno[2′,3′:4,5]pyrimido[1,2-b][1,2,4,5]-tetrazin-6-one system were prepared from the reaction of 3-amino-2-thioxo-1,2,3,5,6,7,8,9-octahydro-4H-cyclohepta[4,5]thieno[2,3-d]pyrimidin-4-one (5) or its 2-methylthio derivative 6 with hydrazonoyl chlorides 9. The mechanism of the studied reactions has been discussed and the biological activity of the isolated products has been evaluated. 相似文献
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《Journal of Sulfur Chemistry》2013,34(6):630-636
A simple original approach to earlier unknown parent 2,7-dihydrothiopyrano[2,3-b]pyrrole (5) from allyl isothiocyanate and propargyl bromide via one-pot synthesis and thermal rearrangement of 2-(prop-2-ynylsulfanyl)-1H-pyrrole (4) has been developed. The compound 5 in the present study was successfully examined as 2,7-dihydrothiopyrano[2,3-b]pyrrole scaffold in the synthesis of corresponding N- and C-pyrrolecarbodithioates. 相似文献
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6-氯咪唑并[1,2-b]哒嗪氢解脱卤反应动力学研究 总被引:2,自引:0,他引:2
采用Pd/C催化剂在排除扩散影响的条件下,研究了常压下6-氯咪唑并[1,2-b]哒嗪氢解脱卤合成咪唑并[1,2-b]哒嗪的反应动力学,通过空白试验消除催化剂及溶剂对吸氢量的影响,以吸氢量来表征反应程度。试验测定了反应温度、pH值对反应速率的影响。研究结果表明,在试验条件下,6-氯咪唑并[1,2-b]哒嗪氢解脱卤反应对6-氯咪唑并[1,2-b]哒嗪表现为零级,反应表观活化能为44.8kJ/mol,指前因子为7.68×104mol.L-1.min-1。pH值为8时有利于反应进行。 相似文献
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Majid Ghashang Syed Sheik Mansoor Mohammad Reza Mohammad Shafiee Mahboubeh Kargar Mohammad Najafi Biregan Fateme Azimi 《Journal of Sulfur Chemistry》2016,37(4):377-390
A mild and efficient method for the synthesis of thiochro meno[4,3-b]pyran and thiopyrano[4,3-b]pyran derivatives using MgO nanopowders as a catalyst is described. The MgO nanopowders were prepared via a green biosynthesis method using an extract of Rosmarinus officinalis leaves and were characterized by Field Emission Scanning Electron Microscopy and X-ray diffraction analyses. 相似文献
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Abdolali Alizadeh Atefeh Roosta Kaveh Amir Ashjaee Asalemi 《Journal of Sulfur Chemistry》2018,39(4):435-442
An extremely concise one-pot procedure toward the synthesis of 2H-Thiopyrano [2,3-b]quinoline-2,3-dicarboxylates whose applications as medicines is predictable has been established. This approach produces three fused rings evolving from the formation of four new carbon–carbon bonds and a stereogenic center in a one-pot protocol. 相似文献
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以2-氯烟酸为起始原料,经过还原、氧化、肟化及环合反应合成了标题化合物,4步反应总收率67.21%.产品经1HNMR和质谱表征.该方法具有操作简单、成本低、环境友好等优点,适合工业化生产. 相似文献
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首次以POC13为环合剂环化苯并噻唑腙,合成了3位取代的1,2,4三唑「3,4-b」苯并噻唑,并提出了合理的反庆历程。 相似文献