三苯基膦被全氟烷基取代基所取代。
Triphenylphosphine has been modified by attachment of perfluoroalkyl substituents.
各种烷基或卤代烷基取代基结合在碳-25上。
Various alkyl or haloalkyl substitutions are incorporated at carbon-25.
该方法由于可以通过改变醇的种类，合成出含不同烷基取代基的百草枯衍生物。
The method can synthesize paraquat derivatives containing different alkyl substituents by changing the type of ethanol.
本发明涉及新颖的烷基取代的哌嗪衍生物，其可用作单胺神经递质再摄取抑制剂。
This invention relates to novel alkyl substituted piperazine derivatives useful as monoamine neurotransmitter re-uptake inhibitors.
烷基取代的炔丙基硫缩酮衍生物，则能利用相对应的末端炔和碘烷亲电基进行取代反应所获得。
However, alkyl-substituted propargylic dithioacetals could be synthesized by the displacement reaction of the corresponding terminal alkynes with alkyl iodides.
以2，7-二溴芴酮为原料，在芴的9位引入三苯胺等芳香取代基代替烷基取代基，增加9位的稳定性。
Starting from 2,7-dibromofluorene, two aryl substituents were introduced to the 9position of fluorene to replace the commonly used alkyl groups to increase the stability of fluorene.
对烷基化壳聚糖进行X射线光电子能谱分析表明，随着卤代烷试剂反应活性的增高，发生在壳聚糖羟基上的烷基取代反应增多。
X-ray photoelectron spectroscopy (XPS) indicated that the higher reaction activity of alkyl halide, the more alkyl substitution degree on hydroxyl group of chitosan.
合成洗涤剂乳化剂如十二烷基硫酸钠取代了皂粉。
Synthetic detergents replaced the soap with emulsifying agents, such as sodium lauryl sulphate.
本文报道了锆烯络合物对炔烃的烷基化加成，合成多取代烯烃，产率较高。
This paper reports the route of synthesis multisubstituted alkenes by addition reaction of alkyne zirconalkylation with zirconocene complexes.
N -取代聚苯胺可以通过聚苯胺的N -烷基化、N -酰基化、N -取代苯胺单体的化学氧化聚合和电化学聚合而得到。
N-substituted polyanilines could be obtained by N-alkylation, N-acylation of polyaniline, chemical oxidation polymerization and electrochemical polymerization of N-substituted aniline monomer.
综述了用烷基、酰基取代聚苯胺以及嵌段、接枝聚苯胺共聚物的制备方法，并对聚苯胺的应用前景作了简要的概述。
This article reviews the methods of modifying polyaniline with alkyl and aryl and preparing block and graft polyaniline copolymers, and briefly summarizes application potential of polyaniline.
研究发现取代烷基为甲基的单酰胺产品，水溶性大，可作为锕系元素水相络合反萃剂，并且废反萃剂加热到250C就可以完成分解。
The experimental results indicate that the monoamide with methyl as the alkyl has a high solubility in water, can be used as the complexing stripping-agent, and discomposes completely at 250 c.
结果显示对1,3-取代位置的优异选择性，并且烷基链可以是饱和的或不饱和的，并且可以含有一种或多种杂原子。
The result shows excellent selectivity of to the 1, 3 - substitution positions, and the alkyl chain may be saturated or unsaturated and may contain one or more heteroatoms.
研究了烷基苯基硅铜酸盐与2-环烯酮的1，4-加成反应的立体选择性，并合成了一系列新的2-取代-3-硅基环烷酮。
The stereoselectivity of 1,4-addition of dialkylphenylsilyl cuprates to 2-cycloenones was investigated and meantime a series of new 2-substituted-3-silylcycloalkanones were synthesized.
本发明涉及式（I）化合物及其药用活性盐，其中R1是氢、低级烷基或苄基，其可任选地被卤素或低级烷氧基取代；
The present invention relates to compounds of formula (I) wherein R1 is hydrogen, lower alkyl or benzyl which may be optionally substituted by halogen or lower alkoxy;
本发明涉及式（I）化合物及其药用活性盐，其中R1是氢、低级烷基或苄基，其可任选地被卤素或低级烷氧基取代；
The present invention relates to compounds of formula (I) wherein R1 is hydrogen, lower alkyl or benzyl which may be optionally substituted by halogen or lower alkoxy;
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