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

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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If the Earth's warming will lead to the emergence of extreme weather, leading to disaster!

地球如果变暖,会导致极端气候的出现, 导致灾害的发生!

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In addition, this extension enables one to travel in relative comfort in extreme weather conditions.

除此之外, 这种延伸可以使人在恶劣的天气中获得相对的舒适.

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Rising seas and more extreme weather have the potential to damage irreplaceable sites.

不断升高的海平面以及更为恶劣的气候都有可能损坏这些不可替代的遗迹.

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Guarantee the financial results of his site according to the objectives determined by his Area manager.

确保分区经理要求的分店财务目标达到预期结果.

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The electrophilic reaction of methyl pyropheophorbide-a ( MPP-a) demonstrates that the electrophilic addition reaction and the electrophilic substitution reaction occur on the vinyl group at 3-position and 20-meso-position, respectively.

焦脱镁叶绿酸a甲酯与溴素的亲电反应表明：在3位乙烯基上发生亲电加成反应，而与20位的meso氢则发生亲电取代反应。

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As an electrophilic agent, the methyl group of methoxy species can directly attack benzene ring to produce toluene via electrophilic substitution reaction.

甲氧基物种的甲基作为一种亲电试剂，可以直接进攻苯环发生亲电取代烷基化反应生成甲苯。

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