苄基

In this dissertation, we choosed anisole as starting material, via chloromethyla tion, cyanogenation, to prepare methoxybenzeneacetonitrile, then fractionated in a fractionating tower, and finally...

本论文也对两步的反应条件进行了探索，获得了比较理想的反应条件。文中还对对甲氧基苄氯自聚的原因与机理进行了探讨，并找到了比较理想的阻聚剂，使得粗品收率提高了10％。

The second reaction we tested was diastereoselective Michael-Aldol annulation of -keto ester 121 with methacrolein to give a key intermediate for synthesizing (--Huperzine A.

通过对反应条件的筛选，我们得到的最好的结果是以-乳酸苄酯为手性辅基的β-酮酯121i为底物，以(1R， 2R)-环己二胺衍生的手性胍85i为催化剂，以无水四氢呋喃为溶剂，在-20℃反应，得到的产物的de值为73.2%。

The second part of this paper relates to the synthesis of 3(2)-fluoro-4-propargyl- benzyl alcohol.

本论文的第二部分工作是3-氟(2-氟)-4炔丙基苄醇的合成探讨。

Mainly engaged in: Hydrogen-imide hydrochloride, o-chlorophenyl cyclopentanone, 3.4 dimethoxy ethyl benzene, butyn single potassium acid, potassium ethyl malonyl, Ding amide, amide isobutyraldehyde , allyl chloroacetate, isopropyl chloroacetate Benzyl aluminum, cyclopentene, cyanide-o-chlorophenyl, o-methyl chloride, sulfuric acid chloride, p-chlorophenol, imidazole, Pinacolone, one chlorine Pinacolone.

主要经营：盐酸氢亚胺、邻氯苯基环戊酮、3.4二甲氧基苯乙酯、丁炔二酸单钾盐、丙二酸单乙酯钾盐、丁酰胺、异丁酰胺、氯乙酸烯丙酯、氯乙酸苄酯异丙醇铝、环戊烯、邻氯苯氰、邻氯苯甲酯氯、硫酸氯、对氯苯酚、咪唑、频呐酮、一氯频呐酮。

The new mutant was able to catalyze the oxidation of 6-benzyloxyindole (6-OBzl-indole) to form colored indigoid dimers as analyzed with mass spectrometry.

该突变体具有比野生型和已报道的其它突变体更广泛的底物适应性，能够催化氧化大位阻底物6-苄氧基吲哚(6-OBzl-indole)生成蓝绿色物质。

Moreover, the principle of the p-methoxybenzyl chloride polymerism and its cause have been analysised in this dissertation.

文中还对对甲氧基苄氯自聚的原因与机理进行了探讨，并找到了比较理想的阻聚剂，使得粗品收率提高了10％。

In the derivatives of 2-(4-bromobenzyl-amino)-4-methyl-6-trifluoromethyl-1, 3, 5 triazine, the atoms of N(8), C (9) were the important active parts, it was considered to bind to the different amino acid residue at the D1 protein as traditional striazine herbicides.

对于2-（4-溴苄氨基）－4-甲基－6-三氟甲基－1，3，5-三氮苯中，N(8)和C(9)是重要的活性部位，和传统的均三氮苯类除草剂分子相比，与D1蛋白上不同的氨基酸残基发生了键合作用。

The general formulas of these compounds are as follows:The strobilurin derivatives were synthesized from substitutedβ-keto esters (2) as starting material which were prepared from substituted ketones (1) and dimethyl carbonate. The ester (2) and methyl hydrazine or substituted amidine were dissolved in methanol and the mixture was heated to reflux to obtain the substituted 5-hydroxy-1H-pyrazole (3) or 4-hydroxy-pyrimidine (4). The title compounds were prepared by reacting the intermediates (3 and 4) with substituted halomethylphenyls which contain four active group under basic conditions.

本论文所合成的strobilurin化合物均是以β-酮酸酯类化合物(2)为起始原料合成的，该中间体(2)是由酮类化合物(1)与碳酸二甲酯在碱性条件下反应生成的，中间体(2)与甲基肼或取代脒类化合物在甲醇中回流制得取代的1H-5-羟基吡唑(3)或4-羟基嘧啶(4)，中间体(3和4)再与包含四种活性基的苄卤中间体在碱性条件下制得目标化合物。

We screened a set of Lewis base organocatalysts derived from chiral pipecolinic acid and tert-butanesulfinamide for the reduction of-N-Cbz-1- phenylpropenamine, including newly designed ones and some of those previously developed in our lab. However, only moderate stereoselectivities, albeit high yields were obtained.

在本课题组前期研究的基础上，我们筛选并设计了一系列以手性哌啶酸和叔丁基亚磺酰胺为母体的有机小分子路易斯碱催化剂，它们能催化三氯氢硅对-N-苄氧羰基-1-苯基丙烯胺的不对称还原，获得很高的收率和中等的对映选择性，并且具有很好的底物普适性。

Bezaldehyde was used as protective agent in first method.S-Epichloeohydrin was aminated and acidulated to give(2S)-1-Amino-3-chloro-propanol Salts.The acetylation of (2S)-1-Amino-3-chloro-propanol by acetic anhydride produced the intermediate-N-[2--3-chloropropyl]acetamide.And then at 20℃,in the presence of lithium tert-butoxide,benzyl 3-fluoro-4-morpholinophenyl carbamate react with-N-[2--3-chloropropyl]acetamide to give linezolid in total yield of 43.6%.

路线一采用苯甲醛作保护剂，使S-环氧氯丙烷氨解、酸化生成S-1-氨基-3-氯-2-丙醇盐酸盐，然后经乙酰化反应后，生成中间体-N-[2-乙酰氧基-3-氯丙基]乙酰胺，再用N-(3-氟-4-吗啉苯基)氨基甲酸苄酯和中间体在催化剂叔丁醇锂存在下25℃反应生成利奈唑酮，总产率达到43.6%。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。