• 2-氨基-5-甲基吡啶反应生成咪唑吡啶

    This is brominated and reacted with 2-amino-5-methylpyridine to give the imidazopyridine.

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  • 考察格氏试剂溶剂反应盐酸吡啶溴化脱甲氧基收率影响

    The effects of solvent of Grignard reagent, pyridine hydrochloride and boron tribromide on yield of product were investigated.

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  • 采用正丁醇-氢氧反应体系,以十六烷基三甲基转移脱乙酰为92%壳聚糖

    The chitosan was prepared with 92% deacetylation degree using n-butanol and sodium hydroxide as a reaction medium and cetyltrimethylammonium bromide as a phase transfer catalyst.

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  • 应用纳米相中成功地促进多种羰基合物和巴豆基的丁烯基化反应,在时间内得到了高产率的高烯丙

    Indium, tin and bismuth nanoparticles successfully mediated crotylation of carbonyl compounds in water to afford the corresponding homoallylic alcohols with good to excellent yields in a short time.

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  • 探讨钾—磷酸体系苯乙酮溴化方法讨论了影响反应收率几个因素

    In this paper, we reported a new method of bromination of acetophenone using potassium bromate in phosphoric acid. Some factors that effect yield are also discussed.

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  • 第二章中,通过理论计算对金催代连二烯环异构化反应机理进行了研究讨论

    In the second chapter, the mechanism of the gold-catalyzed cycloisomerization of bromoallenyl ketone was investigated and discussed.

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  • DMF-四乙基溴化TEAB)质子惰性介质中,马蔺子素连续电子还原生成相应氢阴离子,中间体半醌自由基反应发生

    In DMF tetraethyl ammonium bromide(TEAB) media, the reduction of irisquinone was two successive single electron processes without the chemical reaction of the free radical semiquinone.

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  • 甲酚原料经溴化水解氧基甲基4反应合成药物中间体3,4,5-三甲氧基苯甲醛,收率53

    The 3,4,5 trimethoxybenzaldehyde is synthesized from p cresol in four steps of bromination, hydrolyzation, methoxylation, and methylation, with an overall yield of 53.

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  • 一部分是以基于锌粉-体系、非映选择性的炔丙基化反应关键步骤,合成天然及类天然产物

    The first part describes the syntheses of natural products and natural-like products by means of diastereoselective propargylation as the key step.

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  • 以二溴化芳香芳香二胺为单体,通过缩聚反应合成新型聚合物——亚胺酮,结构1HNMRIR元素分析确认

    Novel poly(imino ketone)(PIK) was synthesized via palladium catalyzed polycondensation reaction. The structures of PIK were confirmed by 1H NMR, IR and elemental analysis.

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  • 用薄层色谱监测溴化乙酰丙酸乙酯生成3-乙酰丙酸乙酯反应过程反应条件,方法简单,快速,准确。

    A simple TLC method for monitoring the synthetic process of 3-bromo-ethyl levulinate is reported, and the reaction condition is optimized.

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  • 有机合成法按糖苷化反应给体不同分为糖基苷给体酰基给体两种方法。生物转方法是利用生物体为转体系合成熊果苷。

    Organic synthesis can be classified into two ways based upon different donor of glycosyl groups in the glycosidation, namely glycosyl-bromo-glycoside donor and acyl donor.

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  • 研究原料配比反应温度因素铜板专用溴化环氧树脂合成工艺影响

    The effects of the feed ratio of raw materials, reaction temperature and the dosage of catalyst, etc factors on the new synthesis process of brominated epoxy resin for copper clad panel were studied.

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  • 通过添加适量四丁基溴化转移使用过量的亚磷酸二异丙补偿强碱环境中的水解,从而提高了反应产率

    The yield was increased through adding tetrabutyl ammonium bromide as the phase transfer catalyst, and using excessive diisopropyl phosphite to compensate its hydrolyzation.

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  • 本文研究-甲基百里香酚蓝-溴化十六烷基三甲基三元络合物光度测定反应条件络合物组成

    In this paper the condition and composition of the ternary complex for determination of cadmium with Cd-methyl thymol blue-cetyl trimethyl ammonium bromide have been put forward.

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  • 苯酚烷基硫酸二甲酯醚缩合水解反应制得阿达帕林,收率51%。

    Adapalene was synthesized from 4-bromophenol by alkylation, etherification, condensation and hydrolysis with an overall yield of 51%.

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  • 无溶剂条件下实现了苯甲酸酐的酰化反应部分产物NMRIR表征

    Acetylation between alcohol and benzoyl oxide was carried out using ZnBr_2 as a Lewis acid catalyst in solvent-free condition. Some structures were characterized by NMR and IR.

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  • 1,3-二甲基金刚烷为原料,溴化硫酸的作用下乙酰胺基水解、成盐等反应及改进的后处理方法得到盐酸美金刚,收率6 7。8%。

    Memantine hydrochloride was synthesized from 1,3 dimethyladamantane by bromination, acetamidation with acetonitrile in sulfuric acid and hydrolysis with an overall yield of 67.8%.

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  • 西他丁合成乙酰乙酸1--5-氯戊烷为原料,活性亚甲基烃、成肟和水解3反应得7-氯-2-氧庚酸乙酯;

    The synthesis of Cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;

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  • 西他丁合成乙酰乙酸1--5-氯戊烷为原料,活性亚甲基烃、成肟和水解3反应得7-氯-2-氧庚酸乙酯;

    The synthesis of Cilastatin sodium started from ethyl acetoacetate and 1-bromo-5-chloropentane, through 3 steps to produce ethyl 7-chloro-2-oxoheptanoate;

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