乙酰甲基

Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.

为研究紫草萘醌类化合物的细胞毒性作用机制，从新疆软紫草根中分离出四种紫草萘醌类化合物β，β二甲基丙烯酰阿卡宁(1)，乙酰阿卡宁(2 )，β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

With benzoic acid, terephthalic acid, 2. 6naphthalene dicarboxylic acid, dimethyl-2, 6-naphthalene dicarboxylate as solutes, water, acetic acid, N, N-dimethylformamide, N, N-dimethylacemide, dimethyl sulphoxide, N-methl2-ketopyrolidine, and the mixture of water and acetic acid as solvents respectively, the solubilities of 15 binary systems and 4 ternary systems were determined.

实验以苯甲酸、对苯二甲酸、2，6-NDCA、2，6-萘二甲酸二甲酯为溶质，以水、醋酸、N，N-二甲基甲酰胺、N，N-二甲基乙酰胺、二甲基亚砜、N-甲基-2-吡咯烷酮以及水和醋酸的混合溶液为溶剂，测定了十五个二元物系和四个三元物系的溶解度数据。

The diluent contain magnesium chloride, potassium citrate, sodium glutamate, dipotassium hydrogen phosphate, monopotassium phosphate and fructose, semen vitality is hightest after frozen.The average value is 0.52,highter than other 5 diluent significantly (P﹤0.01).So chose this diluent as semen cryopreservation diluent on chicken. Definite cryoprotectant, equilibrium time and thaw temperature:On the base of test one,research freeze sheltering effect about glycerin, DMSO ,DMA and DMF, each with 4 consistency.The result showed that 10%DMSO sheltering effect is the best, the next is 4%DMA,semen vitality are 0.58 and 0.55 after frozen.

冷冻保护剂、平衡时间和解冻温度的确定在试验一的基础上，研究甘油、二甲基亚砜、二甲基乙酰胺、二甲基甲酰胺4种冷冻保护剂在4种浓度下对鸡精子的冷冻保护作用，结果表明，10%DMSO保护效果最好，其次为4%浓度的DMA，精液冻后活力分别为0.58和0.55，两者之间差异不显著(P﹥0.05)。

Ib was synthesized by condensation of phthalic anhydride with 2-methylresorcinol in fused AlCl〓/NaCl (5∶1), followed by selective acetylation, methylation, NBS bromination and condensation with sodium ethoxide.

邻苯二甲酸酐在熔融的三氯化铝-氯化钠(5：1)中和-2，6-二羟基甲苯环合得1，3-二羟基-2-甲基蒽醌〓后经选择性乙酰化、甲基化、NBS溴化、乙醇钠缩合得1-甲氧基-2-乙氧甲基-3-羟基蒽醌。

Methods 2-(piperazin-1-yl)-1-(pyrrolidin-1-yl)ethanone (2) was synthesized from pyrrolidine via amidation and substitution, followed by treating with chloroacetyl chloride and triphenylphosphine in a "one pot" manner to give the corresponding phosphonium chloride 3 in a stable and pure form after crystallization from isopropanol.

以四氢吡咯为原料，先与氯乙酰氯成酰胺，再与哌嗪发生取代反应制得中间体［（1-四氢吡咯基）甲基］哌嗪(2)；化合物2与氯乙酰氯和三苯基膦反应，经异丙醇重结晶得到稳定的有机鏻盐(3)；化合物3与3，4，5-三甲氧基苯甲醛发生Wittig反应，再与马来酸成盐得目标化合物马来酸桂哌齐特(1)。

A series of lanthanide complexes (Ln = Er, Nd, Yb) with infrared emission properties were designed and synthesized by using different anionic ligands [1 -phenyl-3-methyl-4-(4-tertbutylbenzoyl)-5-pyrazolone and l-phenyl-3-methyl-4--5-pyrazolone and 2-naphtoyl trifluoroacetone] and netural ligands (2,2-dipyridine, phenanthroline, triphenylphosphine oxide and water). Three crystal structures of these complexes were obtained and structure studied, and the properties of photoluminescence and fluorescent lifetime were studied in detail.

我们通过选用不同的第一配体[1-苯基-3-甲基-4-(4-异丁酰基)-5-吡唑酮，1-苯基-3-甲基-4-(4-叔丁基苯甲酰基)-5-吡唑酮和2-萘基三氟乙酰丙酮]和第二配体(2，2-联吡啶，邻菲啰啉，三苯基氧膦)合成了16个稀土红外配合物(Ln=Er，Nd，Yb)，获得了其中三个配合物的单晶结构，研究了这些稀土红外配合物的光致发光和荧光寿命等性质。

They are insoluble in water, ethanol, methanol, acetone, chloroform and benzene, but soluble in DMA, DMF and DMSO.

它们溶于N，N-二甲基甲酰胺、N，N-二甲基乙酰胺和二甲基亚矾等溶剂，但不溶于水、乙醇、甲醇、丙酮、氯仿和苯。

The resultedα-methylamine was protected by acetyl chloride, and then was chlorosulfonated bychlorosulforic acid at -5℃-0℃followed by treatment with aqueous ammonia givingcompound A in 52.3% yield.

甲基胺再用乙酰基进行保护后，以HSO3Cl为试剂进行氯磺化反应，再用浓氨水进行反应，制得了乙酰基保护的苯磺酰胺类化合物。

Cellulose benzoate,the degree of substitution of which was calculated from the content of C determined by element analysis,was prepared from microcrystalline celluloseand benzoyl chloride under heterogeneous condition and characterized by FT-IR and~1H-NMR.

研究了微晶纤维素和苯甲酰氯在多相条件下合成制备纤维素苯甲酸酯的反应，通过元素分析所得碳的质量百分含量计算了产物的取代度，并系统研究了吡啶与N，N-二甲基乙酰胺或与三乙胺混合反应溶剂、苯甲酰氯与纤维素羟基的摩尔比r、反应温度和反应时间对D S的影响，用FT-IR和1H-NM R对产物进行了表征。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。