R "is a replaceable function, e. G. Acetoxy, methoxy, their acyloxy and alkoxy homologs or halo."
是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。
We select the acetoxy group to protect the hydroxy group from a great number of the protection methods for the hydroxy group.
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。
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.
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 experimental results show that the replacing of the hydroxy groups with acetoxy groups in the resin causes less water uptake, but increases the diffusibility of water in the resin.
实验结果表明，该树脂中的羟基改为乙酸基后可降低树脂的饱和吸水率，并增大水在树脂中的扩散能力。
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.
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.
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。
应用推荐