The resultant was hydrogenised to remove protective group of amino group, then the product was reacted with NaNO2 to give diazonium salt, which was conjugated with salicylic acid, hydroxybenzene, N-salicyloyl glycine acid to get azo derivatives of 4-ASA.

本文首先對(duì)4-ASA的氨基和羥基進(jìn)行了選擇性保護(hù)黄色视频免费网站免费，通過氫化還原法選擇性脫除氨基的保護(hù)基mmm.色，然后將氫化產(chǎn)物制成重氮鹽成年片色大黄全免费网站久久，通過與水楊酸欧美大黑屄、苯酚和水楊酰甘氨酸發(fā)生反應(yīng)生成4-ASA的偶氮衍生物黄色A片视频，最后在堿性條件下水解得到最終產(chǎn)物大黑吊性爱。

Both the protection and deprotective group methods for the amino-group on side chain of a new N-pivot lariat crown ether were studied comparatively.

研究了一種新的氮支套素冠醚側(cè)鏈上氨基的保護(hù)和脫保護(hù)基方法，結(jié)果表明A片网站导航，由過量乙二胺與對(duì)甲苯磺酰氯反應(yīng)得到的單保護(hù)乙二胺（N－對(duì)甲苯磺鮝v日韩免费网址；叶?a），經(jīng)N－烷基化環(huán)化反應(yīng)全国精品第一区黄片，然后在氫化鋁鋰存在下脫除保護(hù)基手机黄网欧美高清，即可制得最佳產(chǎn)率的N－（2－氨基已基）單氮雜－12－冠－4（1）。

A process for reducing nitryl with unstable guanyl on para-position of benzene ring into azyl features that active metal reacts on organic acid and solvent at ordinary temp. and pressure to reduce N-(2 or 3-M, 5 or 6-M',4-nitrophenyl)-N',N'-dimethyl acetamidine into N-(2 or 3-m, 5 or 6-M', 4-aminophenyl)-N',N'-dimethyl acetamidine, where M=H,-R,-OR,-COOR (R=H, C1-C6); and M'=H,-R,-OR,-COOR (R=H, C1-C6). Its advantages include reduced by-reaction and high reducting rate up to 80%-95%.

本發(fā)明是將苯環(huán)上對(duì)位帶有不穩(wěn)定脒基的硝基還原為氨基的方法久久免费视频免费看，采用活潑金屬国产热情网站，如：鋅或錫，與有機(jī)酸和適當(dāng)?shù)娜軇゛v免费在线观看网站大全，在常溫久久国产精品免费一区二区三、常壓下發(fā)生反應(yīng)，將N－（2或3－M看美女被操久久精品，5或6－M＇色色中文网，4－硝基苯基）－N＇，N＇－二甲基乙脒還原為N－（2或3－M在线人成，5或6－M＇欧美大片免费网站黄，4－氨基苯基）－N＇，N＇－二甲基乙脒免费一级黄片视频，其中M＝H国产无套推油按摩女视频推油，－R，－OR国产二区视频在线观看，－COOR（R＝H在在线黄色视频，C1－C6），M＇＝H免费无码一级黄色视频，－R肏屄视频网站，－OR，－COOR（R＝H国产一级在线播放，C1－C6）黄片com.，減少了副反應(yīng)，使還原收率達(dá)到80％以上国产av一码二码三码无码，最高可達(dá)95％以上一级片毛片网址，更適用于工業(yè)化生產(chǎn)。

Therelationship of the amount of catalyst and the ee% of product was seen to be negative nonlin-ear. Catalyst 3 was used in the enantioselective addition of diethylzinc to aromatic aldehydesand gave good results. The configuration of products was determined by the configuration ofthe catalysts' chiral carbon linked with hydroxy group. Using β- amino alcohols bearing only one chiral center as catalysts for the enantiose-lective addition were studied. D-N, N-dialkyl-2-amino butanol gave poor catalytic effect be-cause of their structure. The configuration of the product is the same as the catalyst. Anotherkind of β- amino alcohols - phenylglycine derivatives and valine derivatives have chiralcenter on the carbon linked with amino group. Catalyzed by-phenylglycine derivatives 6,7, 9, 10, the reactions gave satisfied results. The optical yields exceeded 80%.

在探討了含有兩個(gè)手性中心的β-氨基醇之后中文字幕无码毛片一级，選擇了只有一個(gè)手性中心的β-氨基醇一级片黄色网址，一是手性中心為連羥基的手性碳原子：D-N，N-二烷基-2-氨基丁醇；二是手性中心為連氨基的手性碳原子：D-苯基甘氨酸衍生物和L-纈氨酸衍生物在线色av。D-2-氨基丁醇的催化效果不太好18岁进看的黄色网站，這與其結(jié)構(gòu)的空間位阻較小有關(guān)系，反應(yīng)產(chǎn)物與連羥基手性碳構(gòu)型一致日韩制服无码一区福利；由苯基甘氨酸和纈氨酸出發(fā)合成五種β-氨基醇6-10精品欧美日韩一级视频在线观看，研究了不同ee％的-6作用下的二乙基鋅-苯甲醛加成反應(yīng)，發(fā)現(xiàn)該催化劑具有不對(duì)稱放大效應(yīng)大陆精品国产AV成拍色拍；-7日韩永久免费视频，9，lO的催化效果也比較令人滿意jizz在线视频，光學(xué)產(chǎn)率80％以上国产最新综合久久，所得產(chǎn)物構(gòu)型與催化劑構(gòu)型一致黄色视频观看免费的黄色网站。

To understand the reaction of tetrakis hydroxymethyl phosphonium chloride with collagen protein,the interactions of THPC with polycaprolactam,poly vinyl alcohol or ethylenediamine which were used as the model substances of amido,hydroxy and amino groups of collagen protein were examed.

通過研究THPC與聚己內(nèi)酰胺精品一级黄色、聚乙烯醇、乙二胺的酰胺基欧美激情亚洲熟妇、羥基黄色视频在线观看看网站、氨基的反應(yīng)，間接證明THPC主要與膠原蛋白的氨基結(jié)合台湾亚洲综合色区，可與氨基以n∶n=1.0∶2.2形成交聯(lián)2020国产高清成年视频，THPC與羥基和酰胺基均有少量結(jié)合，并在pH=8.0時(shí)結(jié)合量最高欧美视频天。

Crystal by DTT into the protoxin with an end amino group; activation and derivation of abamectin to form abamectin-COONa with a carboxylic group; final bioconjugation by using amino-carboxylic conjugator EDC to achieve the substance combination of two biotoxins.

晶體進(jìn)行酶解改造精品视频网站，形成帶末端氨基的原毒素；將阿維菌素的羥基進(jìn)行激活黄色网站上视频、衍生化一级精品在线，形成帶羧基的阿維菌素衍生物（Abamectin-COONa）；再利用氨基-羧基偶聯(lián)劑進(jìn)行兩種生物毒素的生物耦合国产亚洲丝袜制服。

The a-amino groups of amino acids react reversibly with aldehydes to form a variety of compounds, each of which is called a Schiff's base.

氨基的α氨基與醛反應(yīng)是可逆的igao视频社区，可形成多種化合物，每一種都叫希夫堿爱爱人人。

Bombyx mori silk fibroin film was treated by plasma processes with SO 2 gas to introduce functional groups on the surface of film. Meanwhile, functional groups were also introduced by the reaction of 1,3 propane sultone with amine sites on the surface of silk fibroin film which were produced by NH 3 gas plasma.

從蠶絲中提取的絲素蛋白制備成薄膜日韩一级精品，首次采用二氧化硫等離子體處理在材料表面引入磺酸基團(tuán)；同時(shí)絲素蛋白膜用氨氣等離子體處理后在表面接入氨基人人人人操人人人上，利用 199精品国产高清久久久久久，3 丙磺酸內(nèi)酯與氨基的反應(yīng)在材料表面接枝磺酸基團(tuán)。

Owing to different structures of cotton fiber and chitin fiber ,they have different adsorbability to reactive dyestuffs.

采用不同的醛類化合物對(duì)甲殼素纖維上的氨基進(jìn)行保護(hù)同性AV无码免费无禁网站，活性染料染色后用稀酸脫去氨基的保護(hù)基美女被操下面。

The reactivities of epoxy,melamine and phenolics in epoxy/melamine/ phenolics baking paint were investigated.

考察了環(huán)氧氨基酚醛烘烤涂料中環(huán)氧樹脂、酚醛、氨基的反應(yīng)活性黄色视频海外免费。

amino：氨基的

amino resins 氨基樹脂 | amino 氨基的 | aminoacetic acid 氨基乙酸

Amino resin：氨基樹脂

氨基樹脂(amino resin)是由氨基化合物和甲醛縮聚而成的熱固性樹脂,它通常作為涂料生產(chǎn)的原料.涂料工業(yè)所用的氨基樹脂必須用醇類醚化改性,使之可溶于有機(jī)溶劑中,它在熱固性涂料中起交聯(lián)作用.氨基樹脂漆中,氨基樹脂與醇酸樹脂,聚酯樹脂,

deaminase：脫氨基酶

deairing vessel for flow meter 流量計(jì)用真空器 | deaminase 脫氨基酶 | deaminated wool 脫氨基的羊毛

oxidative deamination：氧化脫氨基(作用)

(一)氧化脫氨基作用(Oxidative Deamination) 氧化脫氨基作用是指在酶的催化下氨基酸在氧化脫氫的同時(shí)脫去氨基的過程. ...在體內(nèi),谷氨酸脫氫酶催化可逆反應(yīng). 一般情況下偏向于谷氨酸的合成(△G°′≈30kJ.mal1),因?yàn)楦邼舛劝睂?duì)機(jī)體有害,此反應(yīng)平衡點(diǎn)...

PABA：對(duì)氨基苯甲酸

伍茲發(fā)現(xiàn)酵母提取物所含的對(duì)氨基苯(甲)酸(PABA)與具有對(duì)抗作用的對(duì)氨基苯磺酰胺極為相似. 這種對(duì)抗作用發(fā)生在生物體需要對(duì)氨基苯(甲)酸的生物新陳代謝過程中. 幾年后,在對(duì)葉酸的研究中發(fā)現(xiàn),對(duì)氨基苯(甲)酸是葉酸分子的一個(gè)組成部分.

amido：表"氨基"之義

amido | 氨基 氨基的 | amido- | 表"氨基"之義 | amidobenzene | 苯胺, 阿尼林

aminoacetal：氨基乙縮醛

amino 氨基的 | aminoacetal 氨基乙縮醛 | aminoacyl 氨基酰

aminoacetic acid：氨基乙酸

amino 氨基的 | aminoacetic acid 氨基乙酸 | aminobutyric 氨基丁酸

deaminated wool：脫氨基的羊毛

deaminase 脫氨基酶 | deaminated wool 脫氨基的羊毛 | Dean and Stark apparatus 迪安-斯脫克水分測(cè)定儀

allosteric：別構(gòu)的

allosteric modification 別構(gòu)修飾 | allosteric 別構(gòu)的 | amino 氨基的 ~acid氨基酸