查询词典 acetophenone
- 与 acetophenone 相关的网络例句 [注:此内容来源于网络,仅供参考]
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A novel method for the synthesis of α-bromo acetophenone s by the reaction of 1,3-dibromo- 5,5-dimethylhydantoin with p-toluenesulfonic acid in methanol at 20~60 ℃ was described.
报道了使用1,3-二溴-5,5-二甲基海因和对甲苯磺酸在甲醇中和20~60℃的温和条件下合成α-溴代苯乙酮的新方法。
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Under the optimal conditions 1.5×10~(-3 mol/L of 22, 1.0 MPa of O_2, 120℃, 20 h, the conversion of ethylbenzene was 37.8%, and the selectivity for acetophenone and 1-phenylethynol was 82.5% and 13.5% respectively.
在22浓度为1.5×10~(-3)mol/L,氧气压力为1.0 MPa,120℃反应20 h,乙苯转化率为37.8%,苯乙酮的选择性为82.5%,1-苯基乙醇的选择性为13.5%,锰配合物23次之。
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Under optimal conditions, oxidation of ethylbenzene into acetophenone under 1 atm O2 and 1 mol% NHPI reach to 64% yield.
在最佳的催化状态下,苯乙烷能在1 atm的氧气、1 mol% NHPI与轴向配位基为吡啶的紫质修饰二氧化钛共催化下,氧化成苯乙酮,并得到64%的产率。
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The synthesis of methyl benzoate was carried out from acetophenone and dimethyl carbonate in the presence of solid acid and base catalysts.
以固体酸碱为催化剂,研究了碳酸二甲酯与苯乙酮合成苯甲酸甲酯的反应,考察了反应温度、反应时间、催化剂用量和原料摩尔配比等因素对反应结果的影响。
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Product has mainly engaged in alcohol-benzene toluene xylene butyl acetate ester, such as acetone acetophenone ring.
主要经营产品有甲苯二甲苯醇苯醋酸丁酯乙酯丙酮环乙酮等。
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The effects of some factors, such as reaction temperature, reaction time, substrate concentration and yeast concentration, on the acetophenone conversion and- 1-phenylethanol enantioselectivity were investigated by orthogonal experiments.
研究了酵母细胞催化芳香酮的不对称还原反应,采用正交试验综合考察了反应温度、反应时间、底物浓度和酵母浓度等因素对底物苯乙酮转化率和产物1苯基乙醇对映选择性的影响。
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The yeast cells asymmetric reduction of aromatic ketone was also study in this work when the acetophenone was as the model substrate.
最后,以2一辛酮(2一Octanone)为模型底物研究了酵母细胞不对称还原前手性脂肪酮的反应特性。
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In this work, the problems of spectrum, quantum yield and lifetime of Phosphoresconce, photosensitization and photostabilization of polymeric acetophenone and its derivatives have been studied.
本工作合成和研究了高分子苯乙酮及其衍生物的光谱、磷光量子产率、磷光寿命以及光敏化、光稳定等问题。
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The results indicated that acetophenone can be reduced by NaBH4/BF3Et2O with high chemical yield and low to moderate enantioselectivity when amino alcohols were used as catalysts.
结果表明:这些氨基醇催化NaBH4/BF3Et2O还原苯乙酮可以获得很高的化学产率和低到中等的对映选择性。
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The product poses a chemical risk because of the presence of acetophenone, a substance classified by Directive 67/548/EEC as harmful if swallowed and irritating to eyes.
通报的理由为该拼图垫不符合欧盟指令67/548/EEC ,垫内含有苯乙酮,吞咽对人体有害,对眼睛也有刺激。
- 推荐网络例句
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Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.
然而现在,所有的孩子都要在综合学校继续学习,所以这次考试只是决定他们将要学习哪些课程。
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Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .
城区的迅速扩大在很多情况下侵占了宝贵的可耕地,使人们普遍认识到发展不能以牺牲农业为代价。
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Detailed Intrinsic Reaction Coordination calculations were carried out to guarantee the optimized transition-state structures being connected to the related tautomers.
同时,做了详尽的内禀反应坐标计算,以保证所得到的过渡态连接相应的始末异构体。