中间体

When a pathway, such as the Embden-Meyerhof pathway or the TCA cycle are amphibolic pathway is referred to as an amphibolic pathway .Pathways of glycolysis and the TCA cycle are amphibolic pathways because they provide ATP and chemical intermediates to build new cell material .The main metabolic pathways ,and their relationship to biosynthesis of cell material ,are shown in figure 21 below.

当一种方式，譬如Embden-Meyerhof方式或三辛胺周期方式，指一条醣解作用为方式路径，并且三辛胺周期是一种方式，因为它们提供ATP 和化工中间体建立新细胞物质主要新陈代谢的方式，与它们的关系构成细胞材料生物合成，下面介绍表21 。

Reaction (1) was examined with different kinds of acetal substrate(1) and vinyl ethyl ether, and the results indicated that the 1, 1,3-triethoxy compounds could be obtained in high yields of 88 and 97% respectively when the R groups of the acetal are phenyl and anisyl, while the yields amounted only to 55-75 % for R=a...

有证据表明这种催化反应也可能是通过正碳离子中间体进行的。本反应的产物1，1，3-三乙氧基化合物经乙酸/乙酸钠溶液水解可得反式α，β-不饱和醛。水解产率：芳香族产物大于90%，脂肪族产物大于75%。

In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

在高度稀释条件下，经4，5-二溴甲基-1，3-二硫杂环戊烯-2-硫酮(7)和多缩乙二醇的1，ω-二巯基衍生物的缩合反应，方便地合成了4，5-位带二硫杂冠醚残基的2-硫代-1，3-二硫杂环戊烯的衍生物8a~8d，中间体硫杂冠醚8c~8d的合成中有明显的&模板效应&。

In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

在高度稀释条件下，经4，5-二溴甲基-1，3-二硫杂环戊烯-2-硫酮(7)和多缩乙二醇的1，ω-二巰基衍生物的缩合反应，方便地合成了4，5-位带二硫杂冠醚残基的2-硫代-1，3-二硫杂环戊烯的衍生物8a~8d，中间体硫杂冠醚8c~8d的合成中有明显的&模板效应&。

Aniline compounds are used as raw material and reacted with anthranilic acid and then phenyl iodide as alkylating agents to give alkylating products followed by cyclizing with concentrated sulphuric acid to give a N-phenyl-acridone(or 3-ethoxyl-N-phenylacridone).The structure of intermediate and target compound are determined by IR and MS.

以苯胺类化合物为原料，先后以邻氯苯甲酸和碘苯为烷基化试剂进行了N 烷基化反应，再用浓硫酸使其环化制得N-苯基吖啶酮和3-乙氧基-N-苯基吖啶酮，并用红外光谱及质谱仪检测了各中间体及目标产物的结构。

Jiangsu Rixin Enterprise Group Co.,Ltd is a leading manufacturer of dyestuff intermediate. Its products includes 1-amino anthraquinone、 Pyrazone anthrone 、Desperse red 92#、1-Nitroanthraquinone etc.

江苏日欣集团是国内主要的染料中间体的生产厂家之一，其主要产品在国内占有重要的地位，产品有：1-氨基蒽醌、吡唑蒽酮、分散92#红、1-硝基蒽醌等。

Yangzhou Rixing Biochemical Products Co.,Ltd is a leading manufacturer of dyestuff intermediate. Its products includes 1-amino anthraquinone、 Pyrazone anthrone 、Desperse red 92#、1-Nitroanthraquinone etc.

扬州日兴生物化工制品有限公司是国内主要的染料中间体的生产厂家之一，其主要产品在国内占有重要的地位，产品有：1-氨基蒽醌、吡唑蒽酮、分散92#红、1-硝基蒽醌等。

RT base(4-aminodiphenylamine),as an important dyestuff intermediate and raw material for 1,4-diaminobenzene antiager, has been widely applied to rubber auxiliary, dye and pharmacy industry.

中文摘要： RT培司，化学名称4―氨基二苯胺，是一种染料中间体，也是生产对苯二胺类防老剂的重要原料，在橡胶助剂、染料、制药等行业得到广泛应用。

In order to develop an useful synthestic process, we have synthesized amides with various substitutents. The isoquinoline skeleton was constructed through Bischler-Napieralski reaction, followed by asymmetric reduction of the imine intermediates with a Ru complex to form the only chiral center. Finally, we connected the two phenyl groups by Heck reaction and effectively obtained optically active aporphine alkaloids.

为了发展一套实用的合成方法，我们首先制备於苯环上具有不同种取代基的苯乙醯胺，接著透过Bischler-Napieralski反应进行分子内合环，并利用钌金属对亚胺中间体进行不对称的还原反应，建立出产物中唯一的光学活性中心，最后再利用Heck反应连结两个苯环，就可以顺利得到具有光学选择性的阿朴吩类天然物。

The selectivity of cyclization of carbodiimide 2 with primary amine was studied and the result showed that the anomalous product being cyclized from arylamino group was formed preferencially.

研究了碳二亚胺2与伯胺成环反应的选择性，结果表明优先生成反常的芳氨基成环产物，利用中间体可能的构型解释了实验结果。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。