氨基甲酸

Polyimide/nano carborundum composite films were made from pyromellitic dianhydride、4, 4'-aminodiphenyl ether、N, N'-dimethyl acetamide and nanometer carborundum.

以均苯四甲酸二酐、4，4'-二氨基二苯醚、N，N'-二甲基乙酰胺为原料，经化学合成反应制备了聚酰亚胺／纳米碳化硅复合薄膜。

In order to find biologically active urea compounds,seven new N-[5-(3-pyridyl)-1,3,4-thiadiazol-2-yl]-N'- urea derivatives were synthesized by the reaction of 2-amino-5-(3-pyridyl)-1,3,4-thiadiazole with aroylazides,which were prepared starting from carboxylic acids,ethyl chloroformate and sodium azide by one-pot procedure.

为了寻找高生物活性的脲类化合物，通过2-氨基-5-(3-吡啶基)-1，3，4-噻二唑与酰基叠氮化物反应，设计合成了7个新的N-[5-(3-吡啶基)-1，3，4-噻二唑-2-基]-N'-取代苯基脲，其中芳酰基叠氮化物是以芳酸、氯甲酸乙酯、叠氮化钠为起始原料采用&一锅法&所制得。

N-Carbobenzoxy-L-homoserinelactone was prepared via N-alkylation reaction of L-methionine and iodoacetamide with benzyl chloroformate as amino protecting agent.

以L-蛋氨酸为原料，氯甲酸苄酯为氨基保护试剂，与碘乙酰胺(I2微量)内酯化反应，合成N-苄氧羰基-L-高丝氨酸内酯。

Part two: Using chloroformic ester reacted with potassuim thiocyanate to get thiocyanic esters. Then reacted with biological substituted pyrimidinamine to synthesize forty two thiourea compounds, thirty eight of them are new compounds. Their structures have been charactered by IR, 1H NMR and elemental analysis.

第二部分：先以氯甲酸酯和硫氰酸钾为原料合成异硫氰酸酯，再与有生物活性的取代氨基嘧啶反应，合成了一系列新的取代嘧啶基硫脲类化合物，合成的42个化合物中有38个为首次合成的新化合物，结构经元素分析、IR及~1H NMR得到确证。

The key intermediate 3-methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods,formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction,and then hydr...

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The key intermediate 3- methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods, formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction, and then hydrolysis.

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

Aim To study the relationship between the structures of a series of 4,4-diaryl-3-butenyl derivatives of nipecotic acid and guvacine and their inhibition activity of the γ-aminobutyric aciduptake.

目的研究3-哌啶甲酸和四氢烟酸的4，4-二芳基-3-丁烯衍生物结构和对γ-氨基丁酸摄取抑制活性之间的关系。

Bromocyclobutanecarboxylic acid is prepared starting from diethyl malonate and trimethylene.

同时还采用5-环丁基乙内酰脲开环法制备了1-氨基环丁甲酸。

Reparation of PBO was begun with the polymerization process in which composite salts that contained 4,6-diaminoresorcinol and terephthalic acid were dissolved in polyphosphoric acid and phosphorus pentoxide.

BO纤维制备：以4，6-二氨基间苯二酚的盐酸盐为单体原料，与对苯二甲酸混合，经过中和反应、脱色处理、干燥后制成复合盐；再以多聚磷酸为溶剂，添加五氧化二磷和抗氧化剂，经过预聚合反应制备出PBO聚合物；聚合物通过双螺杆挤出机进一步进行聚合，然后通过喷丝板挤出，在磷酸水溶液中凝固成型，经过洗涤、干燥等过程，最终卷绕成型。

The effects of imidization method,coagulation bath and temperature were studied on the structure and separation performance of polyimide membrane,prepared by using pyromellitic dianhidride and 4,4′-oxydianiline as raw materials.

针对以均苯四甲酸二酐和4， 4′-二氨基二苯醚为原料合成聚酰亚胺的过程，研究了亚胺化方法、凝胶浴组成与温度等条件对膜的结构和分离性能的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。