氨基

In the second part of the thesis, we discussed a L-proline-catalyzed direct Aldol reaction between L-amino acid-derived N,N-dibenzyl -amino aldehydes 15 and acetone, cyclopentanone or hydroxyacetone, which afforded (-amino--hydroxy- or (-amino-,(-dihydroxy-ketones in good to excellent yields (up to 94%) and diastereoseletivities (up to 94.9%).

发现许多情况下，反应的产率和de值超过90%。接着，在碱性条件下，我们将L-亮氨酸衍生的N，N-二苄基--氨基醛15g与羟基丙酮反应得到的主要产物(，-二羟基-γ-氨基酮171d与次溴酸钠反应，得到了具有抗肿瘤活性的天然产物PM-94128的氨基酸片断184。

In the synthesis of 2,3,5-trichloropyridine, 2-aminopyridine was firstly chloridized to 2-amino-3, 5-dichloropyridine, and then sodium nitrite solution was added with the existence of hydrogen chloride to diazotize the 2-amino-3,5-dichloropyridine.

在2，3，5-三氯吡啶的合成上，首先通过对2-氨基吡啶的氯化生成2-氨基-3，5-二氯吡啶，然后再有盐酸存在条件下加亚硝酸钠溶液重氮化后，发生桑德迈尔反应生成2，3，5-三氯吡啶和3，5-二氯吡啶-2-酮的混合物，最后用氯化亚砜进行再次氯化，经处理得到产品2，3，5-三氯吡啶。

The Mannich bases derived from phenylacetoneand dibenzyl ke- tone (Ⅰ,R=CH_2Ph) prepared in our previous work gave expected semicarba- zones in neutral or slightly acidic media.

几个 Mannich 碱在中性或微酸性的情况下制成它们的缩氨基脲，其中一个Mannich 碱在碱性情况下形成一个含有两分子氨基脲的物质。

Double chain naphthyurea/thiourea piperazine derivatives complex with linear dicarboxylate anions with a high stability constant and 1∶1 stoichiometry of the complex-and the complex was formed through six hydrogen bonds.2 Photophysical behaviors and anion binding of three N,N-dimethylaminochalcone derivatives were studied.

二研究了三种N，N-二甲基氨基查耳酮衍生物的光物理行为及与阴离子的结合能力。4'位不同的取代基-氨基和苯脲基对查耳酮的的分子内电荷转移能力有一定的影响，它们减弱了查耳酮衍生物的分子内电荷转移能力，导致发射光谱蓝移。

A novel type of amphiphilic tri-block copolymers with both pH and temperature sensitiveness: poly-poly (dimethylamino ethyl methacrylate)-poly (ε-caprolactone)(PEG-PDMAEMA-PCL) was synthesized via sequential oxyanionic polymerization of macro-molecular: PEG, with a hydroxyl at one end, and dimethylamino ethyl methacrylate andε-caprolactone, with the potassium naphthalene as the initiator.

在本文中，报道了一类新型的兼具pH和温度敏感的双亲性嵌段共聚物：聚乙二醇-聚甲基丙烯酸N，N-二甲氨基乙酯-聚己内酯(PEG-PDMAEMA-PCL)及聚甲基丙烯酸N，N-二甲氨基乙酯-聚己内酯(PDMAEMA-PCL)的制备；并利用动态光散射和氢核磁共振光谱(~1H NMR)对该嵌段共聚物的水溶液性质进行研究；在此研究结果的基础上，初步探讨了其在仿生物矿化中的应用。

Leuco crystal violet lactone was prepared by heating the mixture of dimethylaniline, p- dimethylaminobenzaldehyde and m- dimethylaminobenzoic acid at 60 ℃ for 5 hours in presence of hydrochioric acid and unea and in the nitrogen atmosphere with 72% yield of LCVL.

等摩尔比的N，N-二甲基苯胺和对二甲氨基苯甲醛在盐酸和脲的存在及氮气保护下，80℃反应0.5h，加入间二甲氨基苯甲酸于90℃反应5h。将反应混合物中和，抽滤，得到无色结晶紫内酯，产率为72%。

Leuco crystal violet lactone was prepared by heating the mixture of dimethylaniline, p-dimethylaminobenzaldehyde and m-dimethylaminobenzoic acid at 60℃ for 5 hours in presence of hydrochloric acid and urea and in the nitrogen atmosphere with 72%yield of LCVL.

等摩尔比的N，N-二甲基苯胺和对二甲氨基苯甲醛在盐酸和脲的存在及氮气保护下，80℃反应0.5h，加入间二甲氨基苯甲酸于90℃反应5h。将反应混合物中和，抽滤，得到无色结晶紫内酯，产率为72%。

The copolycondensation type polyamic acid was synthesized by using 3,3', 4,4'-Benzophenonetetracarboxylic dianhydride as the dianhydride monomer, 4,4'-Diamino diphenylmethane and 4,4'-Oxydianiline as the diamine monomer under microwave irradiation in Dimethylformamide.

在微波辐射条件下，采用3，3'，4，4'-二苯酮四羧酸二酐、4，4'-二氨基二苯甲烷和4，4'-二氨基二苯醚为单体，N，N'-二甲基甲酰胺为溶剂，低温合成一种共缩聚聚酰亚胺的前驱体聚酰胺酸，化学亚胺化脱水环化生成BTDA型共缩聚聚酰亚胺。

The copolycondesation type polyamic acid was synthesized by using pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride as the dianhydride monomers, 4,4'-diamino diphenylmethane and 4,4'-oxydianiline as the diamine monomers under microwave irradiation in dimethylformamide.

在N，N'-二甲基甲酰胺溶剂中，以均苯四甲酸酐和3，3'，4，4'-二苯酮羧酸二酐为二酐单体，4，4'-二氨基二苯醚和4，4'-二氨基二苯甲烷为二胺单体，采用微波辐射低温溶液共缩聚，合成了聚酰胺酸预聚体，然后亚胺化脱水、环化，生成共缩聚聚酰亚胺。

Now we don't know how aminoglycoside antibiotics damages hair cells, but there are some theories about it, such as:(1)AmAn affects the transformation among phosphoinositoln, inositol- 3-phophate and glycerine-2-acyl, also, it can cause the change of Ca2+ concentration in endocellular.

氨基糖甙类抗生素(aminoglycoside antibiotics， AmAn)损伤毛细胞的机制尚不清楚，但有以下几种学说：(1)影响了磷酸肌醇、三磷酸肌醇、二脂酰甘油间转化从而导致细胞内钙离子浓度的变化；(2)抑制G蛋白和鸟氨酸脱羧酶活性；(3)氨基糖甙类抗生素能引起内耳毛细胞的凋亡。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新