酰化

Finasteride has been facilely synthesized from 4-androstene-3, 17-dione by oxidation, ammoniumation, cyanohydrin, dehydration, Ritter reaction, hydrogenation and dehydrogenation.

本文参考有关文献，以雄烯二酮为起始原料，经氧化开环、内酰胺化、氰醇化、Ritter反应引入叔丁基酰胺、氢化还原、最后氧化脱氢制得非那雄胺。

A series of diazonium salts of 4-(N-methyl-N-phenylamino)-3-amino-1,8-naphthalic anhydride 5a, its naphthalimide derivative 5b, and 5e were designed and synthesized,and it was the first time to discover that aromatic radical-induced intramolecular aromatic 1, 5-hydrogen transfer was also involved in the nitrogen-contianed system during Pschorr cyclization.

实验设计合成了4--3-氨基-1，8-萘酐的重氮盐5a、其衍生物N-丁基-4--3-氨基-1，8-萘酰亚胺的重氮盐5b和N--4--3-氨基-1，8-萘酰亚胺的重氮盐5c，并首次发现了通过普朔尔环化反应以氮甲基化的氮为桥原子的体系存在着芳香自由基诱导的芳香1，5-氢转移。

As a preliminary work we prepared bisorganozinc halides directly from diiodide and zinc powder, and investigated their reaction with acyl chloride to give diketone, the reaction mechanism also proposed on the basis of experiments and the literatures.

第三章：带官能团的双有机卤化锌试剂和酰氯的反应研究本章首次探讨了带官能团的双有机卤化锌试剂的制备及其与芳香族酰氯的反应研究。

The optimization of ferment, preparation of immobilized cells, optimization of bioconversion and extraction of nicotinamide were studied in this paper.

本论文中主要研究烟腈水合酶发酵工艺的优化、固定化细胞的制备、固定化细胞生物转化烟腈生产烟酰胺的工艺优化、烟酰胺的提取工艺。

In this study rat a-amidase was expressed secretively in S.

本研究在链霉菌中分泌表达了大鼠的α-酰胺化酶，以便利用链霉菌生产酰胺化多肽。

Nitro-4-methylsulfonylbenzoic acid was prepared from 4-toluene sulfonyl chloride by the reaction of Alkylation (in the condition of sodium sulfite and baking soda), Nitrification (in the condition of nitric acid and vitriol) and Oxidation reaction (in the condition of nitric acid and catalyzer).

研究了以对甲苯磺酰氯为起始原料，首先通过亚硫酸钠和碳酸氢钠的水溶液进行烷基化、其次在浓硝酸和浓硫酸加热回流的条件下峭化、最后在浓硝酸和催化剂的条件下进行氧化，3步反应合成了玉米田高效除草剂甲基磺草酮的重要中间体2-硝基－4-甲磺酰基苯甲酸。

Paraffin wax is the research object in the thesis and is modified by oxidization, amidation and emulsification to produce a series of modified waxes including acylamide wax unfound home and abroad that can be applied in practical industries.

本文以石蜡为研究对象，通过对石蜡进行改性如氧化、酰胺化和乳化，得到一系列改性蜡，包括在国内外未见报道的酰胺化改性蜡，应用于实际工业生产中。

METHODS: Mono-6-O-tosyl-β-CD and mono-6-formyl-β-CD were synthesized separately. Silylatedβ-CD was loaded onto polymer chain of PVA by acetalization to produce PVA containingβ-CD linear high polymer.

分别合成单6-对甲基苯磺酰β-环糊精酯和单6-甲酰基β-环糊精，利用缩醛化反应将醛基化β-环糊精固载到聚乙烯醇大分子链上，合成出聚乙烯醇固载β-环糊精的线性环糊精高分子。

Based on the comparison of the infrared spectra of polyamide homologues, on the changes in the infrared spectra of deuterated and iodine-treated samples of polycaprolactam, and also on the observations of the infrared dichroism of drawn film , the main absorption bands of polycaprolactam in the region 400 cm(-1)-1400cm-1, which are rather structure sensitive, have been assigned as follows: 1370 cm-1 band-VC-N;, 1265 cm-1 and 1205 cm-1 bands-; 1170 cm-1 band-VC-N; 730 cm-1 band-γCH2 of (CH2)n w...

根据对聚酰胺类高聚物红外光谱的类比和对聚酰胺6试样进行氘化和碘处理后红外光谱的改变，以及根据对拉伸过的聚酰胺6薄膜试样的偏振红外光谱的观察，我们对聚酰胺6红外光谱中400cm~(-1)—1400cm~(-1)之间的主要吸收带，作了如下解释：1370cm~(-1)吸收带为ν_；1265cm~(-1)和1205cm~(-1)吸收带为δ_+ν_；1170cm~(-1)吸收带为ν_；730cm~(-1)吸收带为γ_(CH_2)[当(CH_2)_n的n≥4时]；690cm~(-1)吸收带为δ_；580cm~(-1)吸收带亦为δ_。

Based on the comparison of the infrared spectra of polyamide homologues, on the changes in the infrared spectra of deuterated and iodine-treated samples of polycaprolactam, and also on the observations of the infrared dichroism of drawn film, the main absorption bands of polycaprolactam in the region 400 cm(-1)-1400cm-1, which are rather structure sensitive, have been assigned as follows: 1370 cm-1 band-VC-N;, 1265 cm-1 and 1205 cm-1 bands-; 1170 cm-1 band-VC-N; 730 cm-1 band-γCH2 of (CH2)n when n≥...

根据对聚酰胺类高聚物红外光谱的类比和对聚酰胺6试样进行氘化和碘处理后红外光谱的改变，以及根据对拉伸过的聚酰胺6薄膜试样的偏振红外光谱的观察，我们对聚酰胺6红外光谱中400cm~(-1)—1400cm~(-1)之间的主要吸收带，作了如下解释：1370cm~(-1)吸收带为ν_；1265cm~(-1)和1205cm~(-1)吸收带为δ_+ν_；1170cm~(-1)吸收带为ν_；730cm~(-1)吸收带为γ_(CH_2)[当(CH_2)_n的n≥4时]；690cm~(-1)吸收带为δ_；580cm~(-1)吸收带亦为δ_。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐