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JinXianWANG XiaoNingSHI KeHuWANG XiuQinMEN 《中国化学快报》2004,15(3):284-285
An efficient and convenient synthesis of 3, 5, 7-triaryl-4H-1, 2-diazepine from 2, 4,6-triarylpyrylium salts and hydrazine in water under microwave irradiation is reported. The same reaction can be conducted using 2, 4, 6-triarylthiopyrylium salts and hydrazine. 相似文献
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A rapid, high yielding procedure for the synthesis of 2-substituted oxazolines has been achieved under microwave irradiation from alkyl and aryl nitriles and β-amino alcohols using a mild Lewis acid catalyst. 相似文献
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In recent years, considerable efforts have been devoted to the development of systems in which C60 is covalently linked to an electron donor.[1] Studies[2] on intermolecular photoinduced electron transfer between C60 and triphenyl amine show that triphenyl amine is a good donor. It is envisaged that the use of donor segments consisting of either pyrrole/aniline may extend the lifetime of charge-separated state.[3] Since Gedye[4] demonstrated that many organic reactions can be conducted rapidly under microwave irradiation, here we have successfully synthesized five new fulleropyrrolidines containing triphenyl amine or thiophene dyads under microwave irradiation, which are different from traditional heating. The determination of structures of these fulleropyrrolidines is in progress. On the other hand, we have studied the geometry, electronic structures and frontier orbitals of these N-methyl-pyrrolo[3,4]C60 derivatives by using AM1semiempirical quantum calculation method. The results indicate that there exists strong intramolecular electron transfer in them. 相似文献
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A series of 2-amino-6-(2-oxo-2H-chromen-3-yl)-4-pyridine-3-carbo-nitriles were synthesized by the one-pot, multicomponent reaction of 3-acetyl-coumarin, aromatic aldehydes, malononitrile, and ammonium acetate in acetic acid under microwave irradiation. The reactions were completed in 10–13 min with 61–86% yields, were environmental benign, and had easy workup. Their structures were confirmed by 1H NMR, IR, and MS spectra and elemental analysis. 相似文献
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A series of 5-arylidene-2-imino-4-thiazolidinone derivatives were synthesized by the cross-aldol condensation of aromatic aldehydes with 2-imino-4-thiazolidinone in sodium acetate/acetic acid under microwave irradiation. The reactions were completed in 10 min with 63–91% yields, were environmental benign, and had easy workup. 相似文献
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Eva Veverková Mária Meciarová ?tefan Toma Jozef Balko 《Monatshefte für Chemie / Chemical Monthly》2003,14(6):1215-1219
Salicylanilides were prepared in 70–95% yields in 4–8min from phenyl salicylate or phenyl 4-methoxysalicylate and substituted anilines under microwave irradiation under solvent free conditions. 相似文献
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Summary. Salicylanilides were prepared in 70–95% yields in 4–8min from phenyl salicylate or phenyl 4-methoxysalicylate and substituted anilines under microwave irradiation under solvent free conditions.Received October 17, 2002; accepted October 22, 2002
Published online July 3, 2003 相似文献
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微波辐射下肉桂酸的合成研究 总被引:9,自引:0,他引:9
研究了微波辐射下肉桂酸的Knoevenagel-Doebner合成新方法。以工本甲醛为反应底物,丙二酸为试剂,吡啶作溶剂,苯胺作催化剂,考察了苯甲醛与丙二酸的摩尔比、微波功率、反应时间、催化剂用量等对反应的影响。经正交实验设计得到最佳反应条件:丙二酸用量为2.510g,丙二酸与苯甲醛摩尔比1.20,苯胺用量0.26mL,微波功率464W,反应时间19min,肉桂酸的产率几乎是定量的。经重结晶后,精产率为67.17%,并分析了有关原因。结果表明,微波技术用于肉桂酸的合成,操作简便、反应迅速、收率高,具有一定的应用价值。 相似文献
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A simple,efficient and eco-friendly method for the synthesis of thiosemicarbazones from thiosemicarbazidesand aldehyde under microwave irradiation has been reported,and no solvent and catalyst were used.And the tech-nique of microwave irradiation coupled with solvent-free condition proved to be a quite valuable method in the or-ganic synthesis. 相似文献
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Guanylhydrazone derivatives were obtained by the condensation of glucosylated aminoguanidines with 3‐formylchromones in refluxing THF. Target compounds were synthesized by conventional method, microwave promotion and ultrasound irradiation methods. The structure of all new compounds was confirmed by IR, 1H NMR, 13C NMR spectral data and elemental analyses. 相似文献
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铜酞菁的微波辐照法合成 总被引:5,自引:0,他引:5
在微波辐照条件下,对铜酞菁的合成进行了研究。考察了辐照时间、尿素和氯化亚铜的用量、催化剂的种类及用量对铜酞菁产率的影响。发现在高功率微波辐照条件下,采用间歇辐照方式,以苯酐质量3%的钼酸铵为催化剂,mol苯酐:mol尿素:mol氯化亚铜=1:5:0.20-0.23,累计辐照630s,产率最高。若以氧化钼为催化剂,产率随其用量的增加而增加,并逐步趋向平稳,但催化效果不如钼酸铵。在相同原料配比条件下,微波法的产率比用常规的加热方法(200℃)高、反应时间短。两种方法所得产物的晶型经X-射线粉末衍射分析均是β型为主,经浓硫酸精制转变为α型。 相似文献