苄胺

Results: During 1995~2006, the resistant rate of the 556 gonococcus strains to 7 different kinds of antibiotics gradually increased.

结果：1995年以来淋球菌对头孢三嗪、壮观霉素、丁胺卡那、氟哌酸、青霉素、氨苄青霉素、红霉素的耐药率分别为2.5%、17.5%、27.5%、40.0%、57.5%、57.5%、82.5%到2006年的52.2%、69.6%、78.3%、82.6%、91.3%、91.3%、95.7%。

Procarbazine, nitrogen mustard, and ifosfamide, which can increase risk for myelodysplastic syndromes and acute myelogenous leukemia.

甲基苄肼、氮芥和异环磷酰胺：会增加患骨髓增生异常综合症和急性髓系白血病的风险。

The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.

产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17)；同时，将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛，异戊醛和环己醛)的不对称烯丙基化反应，并与广泛应用的Roush配体(22)和Brown配体(27)相比较，发现其立体选择性优于Roush配体，并接近Brown配体，但明显具有可回收利用的优势。

One synthetic strategy started fromγ-butyrolactone 38, from which a cyclohexadiene intermediate 30 was prepared in an overall yield of 44% in a 7-step procedure after y-butyrolactone underwent a-bromination, dehydrobromination, Diels-Alder reaction, aminolysis, benzylation, bromination and dehydrobromination, with the key step being the Diels-Alder reaction under harsh condition.

其中一个路线从γ-丁内酯38开始，连续经过α-溴化、脱溴化氢、Diels-Alder反应、胺解、苄基化、溴化和脱溴化氢共7步反应，制备了一个环己二烯衍生物30，总产率44％，关键步骤是高温高压下Diels-Alder反应。

The mixed collectors studied were as following: benzyl arsonic acid-sodium butyl xanthate for walframite flotation, salicylohydroxamic acid-F〓, salicylohydroxamic acid-cupferron, salicylohydroxamic acid-TBP , F〓-TBP, cupferron-benzohydroxamic acid etc. for cassiterite flotation and mixed aliphatic acid or aliphatic amine for beryl or spodumene flotation.

研究过程中，本文选用了如下具体实例：苄基胂酸与丁基黄药浮选黑钨矿，水杨羟肟酸与F〓、水杨羟肟酸与铜铁灵、水杨羟肟酸与磷酸三丁酯、F〓与磷酸三丁酯、铜铁灵与苯异羟肟酸两两结合浮选锡石，混合脂肪胺与混合脂肪酸浮选锂辉石与绿柱石。

And thus, either one of the two geometrical isomers can be obtainedat will in high yield with high stercoselectivity,Two different stereoselectivities are displayed in thereactions of arsonium and telluronium benzylides with α,β-unsaturated esters and amides.

发现了苄基胂、碲叶立德在与α，β-不饱和酯、酰胺的环丙烷化反应中表现出不同的立体选择性，肉桂基胂、碲叶立德与α，β-不饱和酯反应时亦是如此。

The mixed trimeric compounds containing one ferrocene unit, N,N'-bis(2-hydroxy-5-substituted benzylidene)ferrocenylmethylenediamine, have been synthesized directly through the reaction between 1 mol of ferrocenecarboxaldehyde and 2 mol of 5-substituted salicylaldehyde.

通过甲酰基二茂铁与取代水杨醛和氨反应，直接合成了含一个二茂铁的混合三聚产物， N，N'-二[2-羟基-5-取代苄烯]二茂铁甲二胺。

Five types of compounds were synthesized via modification of the leading compounds, Mannich bases of cyclopentanones. Among the target compounds, one type was aromatic amine derivatives of a leading compound, three were Mannich bases of a - benzylidene cyclopentanone, the fifth was a Mannich base of a - benzyl cyclopentanone.

以具有抗炎活性的环戊酮Mannich碱为先导化合物进行结构改造，设计合成了一类已知化合物的芳胺Mannich碱衍生物，三类α-苯亚甲基环戊酮Mannich碱类化合物，一类α-苄基环戊酮Mannich碱类化合物。22个目标化合物的结构经核磁共振氢谱、红外光谱和质谱检测确证。

Results Cefoperazone/Sulbactam, Imipenem, Piperacillin/Tazobactam, Cefetamet and Quinolones had strong effects to resist Chromobacterium violaceum,while resistant effects of those antibiotics were not significant, including Ampicillin, Cefazolin, Gentamicin, Tobramycin, Aztreonam, Ceftriaxono, and Ceftazidime.

结果 12种抗菌药物中舒普深、亚胺培南、特治星、马斯平及喹喏酮类抗菌药物对紫色色杆菌均有较强的抗菌作用，而氨苄西林、头孢唑啉、庆大霉素、妥布霉素、氨曲南、头孢曲松和头孢他啶等抗菌药物抗菌效果不佳。

The third part of this thesis is reactive simulating calculation In this section, some well-known auxiliaries are selected to compute in density functional theory B3LYP on Gaussian 03, from which the relationship between reaction active energies of transition states and enantiomeric excess of chiral products homoallylic alcohols isobtained based on relative reactive ratio theory. Using this relationship, calculations on the reaction of more than eight auxiliaries with four other aldehydes are carried out in AMI and MNDO, proving that N,N\'-dibenzyl tartamide has higher enantioselectivity than others in this reaction.

第三部分为计算化学部分，运用密度泛函理论B3LYP方法在Gaussian03软件上对已经报道的几种手性配体参与的醛不对称烯丙基化反应过程进行模拟计算，基于相对反应速率理论找出两种构型过渡态间活化能的差异与产物光学收率之间的关系；并以此为基础，用AM1和MNDO方法对上述合成的几种配体控制的反应过程进行量化计算，从而在理论上证实了N-苄基酒石酸二酰胺配体在醛的不对称烯丙基化反应中具有较高的立体选择性。

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。