在众多的羟基保护方法中，选择了乙酰氧基对其进行了保护。
We select the acetoxy group to protect the hydroxy group from a great number of the protection methods for the hydroxy group.
所得负载的钯-金催化剂在乙酰氧基化中具有增加的活性和稳定性。
The resultant supported palladium-gold catalysts have increased activity and stability in the acetoxylation.
本文主要是以二乙酰氧基硅烷与二元羧酸进行缩聚反应，合成了一系列聚硅基酯。
This paper reports the synthesis of a series of poly (silyl ester)s by diacetoxylsilane with several dicarboxylic acid.
以异丙醇为柱前衍生试剂，建立了反相高效液相色谱法间接测定2-乙酰氧基异丁酰溴的新方法。
A rapid reverse high performance liquid chromatography method based on the iso - propyl alcohol as an agent of pre-derivatization is developed for the determination of 2-acetoxyisobutyryl bromide.
混合物中甲基三乙酰氧基硅烷含量为75～ 85％，烷基三乙酰氧基硅烷含量为15～25％；
In the mixture, the content of methyltriacetoxysilane is 75% to 85%, and the content of alkyltriacetoxysilane is 15% to 25%;
反应混合物可以进一步酯化重排制备维生素A的中间体1-氯-2-甲基-4-乙酰氧基-2-丁烯。
The reaction mixture then undergo esterification and rearrangement reaction to prepare 1-chloro-2-methyl-4-(acetyloxy)-2-butene, which is a important intermediate of vitamin A.
对乙酰氧基苯甲酸与含磺酸基PET离聚物通过熔融共缩聚反应，获得一系列不同离子含量的液晶离聚物。
A series of polyester based liquid crystalline ionomers(LCI) with various sulfonate group content were prepared from p acetoxybenzoic acid and sulfonated PET ionomers through melt copolycondensation.
通过NOESY实验以及偶合常数的分析，确定了其结构中1,10位双键和甲氧基、乙酰氧基、甲基等基团的相对构型。
The relative stereochemistry of the 1, 10-double bond and that of the methoxyl, methyl, and acetoxy groups were determined by NOESY experiments and analyses of the coupling constants.
由对乙酰氧基苯甲酸、对苯二酚二乙酯、2，6-萘二甲酸及间苯二甲酸四种单体通过熔融缩聚反应，合成了全芳香族四组分共聚酯。
The wholly aromatic four-component copolyesters were prepared from p-acetoxy-benzoic acid, hydroquinone diacetate, 2,6-naphthalene dicarboxylic acid and isophthalic acid by melting polycondensation.
结果：7- 氨基-3-去乙酰氧基头孢烷酸（7-ADCA）和苯甘氨酸邓钠盐反应，只需要一步结晶即可得头孢氨苄，总收率89．4％。
Result: Through the reaction of 7-ADCA and Dane Salt, one step crystallization gives Cefalexin with the total yield 89.4% .
购买发红色光芒的夜光灯、闹钟和其它卧室电子设备，比起白色或蓝色灯源较少干扰n-乙酰- 5 -甲氧基色胺的产生。
Buy nightlights, alarm clocks, and other bedroom electronics that are illuminated with red light, which is less disturbing to melatonin production than white or blue light.
Northrup认为，一个优质的晚上睡眠将修复你的免疫系统，因为当你有个优质睡眠时，N -乙酰- 5 -甲氧基色胺水平上升，它将提高免疫力。
A good night's sleep will restore the immune system, Northrup says, because when you get a good night's sleep, melatonin levels rise and that improves immunity.
介绍了一种含环氧基聚酯的羟值测定方法，即乙酰氯法。
A method for determining hydroxyl value of epoxy-containing polyester, namely acetyl chloride method is introduced.
其中，化合物1是一个以线性四核铜配合物为基本单元的一维链聚合物，此时水杨醛缩苯氧基乙酰腙配体L1是五啮配体。
The adjacent complex molecules 1 are linked by N-N bridge of the pentadentate ligand L1, resulting in an one-dimensional polymer.
其中，化合物1是一个以线性四核铜配合物为基本单元的一维链聚合物，此时水杨醛缩苯氧基乙酰腙配体L1是五啮配体。
The adjacent complex molecules 1 are linked by N-N bridge of the pentadentate ligand L1, resulting in an one-dimensional polymer.
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