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朱玉青  余生  胡新根  陈帆 《辽宁化工》2009,38(3):180-184
综述了5-氯-2,3-二氢-2-羟基-1-氧代-1H-茚-2-羧酸甲酯的各种合成方法。认为研究开发基于手性配体的金属催化剂是提高产品ee值和产率的重要发展途径。  相似文献   
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In the present study, we investigated the insecticidal efficacy of indoxacarb on wheat and maize, against adults of three major stored-grain species, the rice weevil, Sitophilius oryzae (L.) (Coleoptera: Curculionidae), the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) and the confused flour beetle, Tribollium confusum Jacquelin Du Val (Coleoptera). For this purpose, bioassays were carried out with indoxacarb at the doses 0.1, 1 and 10 ppm. Moreover, the treated grains were left at the laboratory for a period of six months, in order to examine the residual effect of indoxacarb, by conducting bioassays at monthly intervals. For S. oryzae and R. dominica, adults were exposed in the treated grains for 7 and 14 d, while for T. confusum adults were exposed for 14 and 21 d, in order to estimate the mortality level. After the termination of this interval, the treated samples were left for an additional period of 65 days, on which progeny production was recorded. R. dominica was by far more susceptible than S. oryzae, given that mortality, in many cases, reached 100% even after 7 d of exposure, even at the lowest dose rate of 0.1 ppm. At the same time, for this species, progeny production was low. For S. oryzae, mortality was low at 0.1 ppm, with high levels of progeny production. T. confusum was the least susceptible of the species tested. Generally, during the experimental period, the efficacy of indoxacarb was decreased, but mortality was higher on wheat than on maize. Indoxacarb residues determination by GC-ECD indicated that after 6 months 33% of the insecticide remains in grains at 0.1 ppm dose, about 40–50% at 1 ppm and about 40–60% at 10 ppm dose. Based on the results of the present work, indoxacarb is an effective grain protectant, at least in the case of R. dominica and S. oryzae.  相似文献   
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在传统合成方法的基础上,分别以5-氯-1-茚酮和4-三氟甲氧基苯胺作为起始物,以绿色化学品碳酸二甲酯(DMC)作为甲氧羰基化试剂兼作溶剂来合成茚虫威二种关键中间体的前驱体。与传统的合成方法相比,该合成方法操作简便、安全,且收率较高,符合绿色合成的要求。  相似文献   
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通过催化加氢合成茚虫威(indoxacarb)中间体反应用钯炭催化剂的性能对比,考察了钯炭催化剂的载体和载体预处理对催化剂性能的影响。实验结果表明:硝酸超声回流处理活性炭可以有效地去除活性炭中的杂质灰分,减小杂质对催化剂性能的影响;选择平均孔径大和比表面积高的活性炭为Pd/C催化剂载体可以获得较好的催化反应活性和选择性。  相似文献   
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