Methods linezolid was prepared by the steps of substitution , reduction , acylation and condensation with biacetyl compond from the starting material 3 , 4 - difluoronotrobenzene 方法以3 , 4 -二氟硝基苯为原料,经取代、还原、酰化、再与侧链双乙酰化合物缩合得到目标化合物。
3 . a kind of novel pu with nonlinear optical conjugated group was synthesized by poiymerization . these polymers were characterized using ft - ir , uv , 1h - nmr and vpo 采用缩聚的方法合成了一系列含非线性长侧链的聚氨酯,并通过~ 1h - nmr 、 ft - ir 、 uv和vpo等方法对聚合物的结构进行了表征。
Using copper ( i ) chloride as catalyst , a kind of novel macromolecular diacetylenes with nonlinear optical conjugated group was synthesized . these polymers were characterized using ft - ir , uv and " h - nmr . . 4 采用金属氧化偶联法合成了一类含非线性侧链高分子二乙炔,并通过h - nmr 、 ir和uv等方法对高分子二乙炔进行了表征。
The primary structure is composed of a circle comprised of 15 kinds of molecules , while the 4th and 5th sites of carbon are intergrated with a circle of unsaturated oxygen , and a lipid chian is ligated at the 13th site of carbon 其骨架由一个15元环组成,在环的碳4和碳5位又与一个不饱和的4元氧环相联,在碳十三位还带一个酯基侧链。
Manufacturer of organic bromine compounds in india . products include alkyl , acetyl , and allyl bromides , bromo - aromatics , and ethylene dibromide , for use as intermediates in fine chemical and pharmaceutical manufacture -提供紫外线吸收剂benzophenone系列和医药中间体:琥珀酸单乙脂酰氯罗红侧链二环乙基碳二亚胺溴乙醛缩二乙醇等的单位。
On the basis of anal zing structure - activity relationship , the key points and solving methods of synthesizing brassinosteroids are introduced from the synthesis of matrix - cycle and introducing side chain 在分析油菜甾醇内酯类植物生长调节剂结构与活性关系的基础上,从母环的合成和侧链的引入两个方面详细介绍了该类化合物的合成关键及解决方法。
A kind of novel pu and poly ( acrylate - co - methyl methacrylate ) s with nonlinear optical conjugated group were synthesized . their properties were studied . the main contents of this dissertation consist of the following points : 1 本论文合成了一类含非线性生色团的长侧链的聚氨酯和一类聚丙烯酸酯及其与甲基丙烯酸甲酯的共聚物,并对它们的非线性光学性能进行了研究。
When the graft ratio was high , the hydrophilic side chain was long and the molecular mass of the main chain of the hydrophilic matrix was great , the diffusion of pp - g - peg in pp blends would be poor , and the diffusion coefficient would also be small 接枝率越高、亲水性侧链的长度越长,亲基体主链摩尔质量越大,接枝共聚物在聚丙烯共混体系中的迁移扩散性能越差,扩散系数越小。
The mechanism of photoalignment is that the selective photoreaction broke out on the surface of the polymer under the irradiation of linearly polarized ultraviolet light ( lpuv ) . the orientational alignment of molecular chains induces lc alignment in a certain direction 光控取向的原理是在线偏振紫外光作用下,光敏聚合物侧链定向光交联,出现分子链段的指向有序分布,从而诱导液晶分子排列。
Bc asphaltenes similar to petroleum asphaltenes and consist of aromatic nuclei , aliphatic chains , and naphthenic ring structures combined in three - dimensional network . but black carbon asphaltenes contains more aromatic carbon , oxygen - function groups , and less aliphatic chains 但碳黑沥青质与原油沥青质也是不同的,碳黑沥青质的分子结构中含有更多的芳香结构组分和含氧基团,较少的脂肪侧链组分。