In the preparation of grignard reagent from inert alkyl bromide, the difficulty of the initiation of the reaction, which reduces the yield, limits its further application.

Studies on the Synthesis of Sesamin-group Lignans IV.A Study of the Reaction between Dimethyl 2-Phenyl-furane-3,4-dicarboxylate and Grignard Reagents

芝麻素类型木脂素的合成研究Ⅳ2－苯基呋喃3，4－二羧酸二甲脂与格氏试剂反应的研究

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After the Grignard reaction of ⅱ with ⅲ and the formation of hydrochloride salt, ⅳ was obtained by debenzylation in absolute ethanol with Pd/ C as catalyst under atmospheric pressure of hydrogen at 60 ℃ followed by hydrolysis with NaOH.

与进行格氏反应后，盐酸成盐，以无水乙醇作溶剂，5%Pd/C为催化剂，常压下60℃进行氢化脱苄，碱化后，得。

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Cyclic amide ( incl. cyclic carbamates) and their derivatives ( excl. ureines and their derivatives), and salts thereof Grignard reaction of methyl pyropheophorbide substituted at 3-position by acyl group and synthesis of chlorophyll derivatives

环酰（包括环氨基甲酸酯）及其衍生物（不包括烷基脲及基衍生物）和它们的盐类3-酰基焦脱镁叶绿酸甲酯的格氏反应及其叶绿素衍生物的合成

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Comparing with ordinary conditions, this method has unique advantages, such as shorter reaction time, saving resource, simpler operation and higher yield, etc.

与常规引发条件相比，超声波引发格氏反应具有反应时间短、节约能源、操作简便、产率高等优点。

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In this paper, 8-allyl-8-hydroxytricyclo [ 5,2,1,0 2,6] decane was prepared from tricyclo [ 5,2,1,0 2,6] decane-8-one through Grignard reaction.

在这篇文章中，以三环[5,2,1,02,6]癸烷-8-酮为原料，通过格氏反应合成了8-烯丙基-8-羟基三环[5,2,1,02,6]癸烷。

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ResultsThe main by-product was11,17-d i-addition product of Grignard reagent of N, N-dimethylamino phenyl bromide.

结果证实了副产物是11，17位双加成的格氏反应的产物。

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Grignard reaction of methyl pyropheophorbide substituted at 3-position by acyl group and synthesis of chlorophyll derivatives

3-酰基焦脱镁叶绿酸甲酯的格氏反应及其叶绿素衍生物的合成

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The Grignard-like reaction was that used the reagent replaced magnesium with zincum in water.

类格氏反应是用锌代替镁，在水体系中进行的增长碳链的反应。

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Synthesis of Aromatics by Grignard Reaction with Supersonic Wave as Revulsant

超声波引发格氏反应制备几种香料

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At last, the 1,1,4,4-tetraphenyl-1,3-butadiene derivatives ( 3a) and ( 3b) were synthesized by the Grignard reaction of ( 2) and benzophenone derivatives, with the yields being higher than 54.0%. The synthesizing requirements of all the steps were studied.

再与二苯甲酮衍生物经格氏反应制得了1,1,4,4-四苯基-1,3-丁二烯衍生物（3a）和（3b），收率高于54.0%，并对各步合成的工艺条件进行了研究。

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Classic carbon-carbon bond-forming reactions such as Grignard, Wittig, and Diels-Alder reactions have played significantly important roles in organic synthesis since their discoveries.

格氏反应、Wittig反应、Diels-Alder反应等经典的碳-碳键成键反应从它们的发现开始就在有机合成中扮演了举足轻重的角色。

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In total, 21 benzalcohol derivatives have been synthesized via Green reaction, and their structures have been proved by 1H NMR and GC MS.

通过格氏反应设计合成了21个化合物，所有目标化合物的结构经1H NMR和GC-MS分析确证。

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Research on The Application of Modified BP Neural Networks Model in Grignard Reaction

格氏反应中改进BP神经网络模型的应用研究

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Everybody spots the Chinese team as the winner.

人人都猜准中国队会得胜.

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The Chinese team will meet the American team head-on.

很多成语来源于历史故事.

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Chinese Team couldn't stop them . They kicked four and our team lost the game.

中国队根本抵御不住他们的进攻,最终以零比四输了这场比赛.

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Competition from the Chinese team first kick-off.

比赛由中国队首先开球.

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But she cautioned creating further instability through a major shift in central banks'currency reserves.

但是,她也提醒到,央行货币储备的大的变动可能会进一步加重经济的不稳定性.

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Currency reserves are approaching $ 2 trillion.

目前国内外汇储备接近2万亿.

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Their accumulated foreign currency reserves of the 2000 s will help.

它们在本世纪积累下来的外汇储备将有所助益.

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