首页> 外文学位 >Theoretical organic chemistry and organic biology: Using theoretical tools to understand the mechanisms and predict the origins of stereoselectivity of asymmetric organic reactions and protein catalysis.
【24h】

Theoretical organic chemistry and organic biology: Using theoretical tools to understand the mechanisms and predict the origins of stereoselectivity of asymmetric organic reactions and protein catalysis.

机译:理论有机化学和有机生物学:使用理论工具来理解机理,并预测不对称有机反应和蛋白质催化的立体选择性的起源。

获取原文
获取原文并翻译 | 示例

摘要

This dissertation describes theoretical studies aimed at elucidating the mechanism, reactivity, and stereo selectivity of asymmetric organic reactions and protein---catalytic antibody and enzyme---catalysis.; Chapter 1 describes a general understanding of molecular recognition and catalysis. Section 1 reviews the binding affinities of host-guest, protein-ligand, and protein-transition state complexes. Section 2 investigates the origins of enzyme proficiencies.; Chapter 2 describes computational studies to predict the origins of stereoselective antibody and enzyme catalysis. Section 1 involves theoretical analysis of Diels-Alder catalysis by 39A11 and its germ-line antibody. Section 2 inspects the mechanism of the glutathione transferase-catalyzed conversion of the antitumor 2-crotonyloxymethyl-2-cycloalkenones to the GSH adducts. Section 3 presents the quantum mechanics calculations of deoxyribose phosphate aldolase (DERA) catalyzed aldol reaction as well as uncatalyzed and amine catalyzed aldol reactions as comparisons.; Chapter 3 describes torquoselectivity, i.e. mechanistic studies of cyclobutene ring-openings. Section 1 examines the origins of inward torquoselectivity by silyl groups and other sigma-Acceptors. Section 2 covers the theoretical exploration of the torquoselectivity through protonation of basic substituents.; Chapter 4 describes mechanistic studies of novel reactions, intermediates and stereoselective organocatalysts. Section 1 studies the mechanism of cis-enamide formation from N-(alpha-silyl)allyl amides and explore the synthetic potential of stepwise dyotropic rearrangements. Section 2 reports the transition state models for the stereo selectivity of strain-release allylations.
机译:本文阐述了旨在阐明不对称有机反应以及蛋白催化的抗体和酶催化的机理,反应性和立体选择性的理论研究。第1章介绍了对分子识别和催化的一般理解。第1节回顾了宿主-客体,蛋白质-配体和蛋白质-过渡态复合物的结合亲和力。第2节研究了酶熟练程度的起源。第2章介绍了计算研究,以预测立体选择性抗体和酶催化的起源。第1节涉及39A11及其种系抗体对Diels-Alder催化的理论分析。第2节考察了谷胱甘肽转移酶催化的抗肿瘤药2-巴豆酰氧基甲基-2-环烯酮转化为GSH加合物的机理。第三部分介绍了脱氧核糖磷酸醛缩醛糖醛缩酶(DERA)催化的醛醇缩合反应以及未催化和胺催化的醛醇缩合反应的量子力学计算。第三章描述了对环的选择性,即环丁烯开环的机理研究。第1节研究了甲硅烷基和其他sigma-Acceptors对内选择性的起源。第2节涵盖了通过碱性取代基的质子化对torquoselectivity的理论探索。第4章描述了新型反应,中间体和立体选择性有机催化剂的机理研究。第1部分研究了由N-(α-甲硅烷基)烯丙基酰胺形成顺式酰胺的机理,并探讨了逐步向液型重排的合成潜力。第2节报告了应变释放烯丙基化的立体选择性的过渡态模型。

著录项

  • 作者

    Zhang, Xiyun.;

  • 作者单位

    University of California, Los Angeles.;

  • 授予单位 University of California, Los Angeles.;
  • 学科 Chemistry Organic.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 221 p.
  • 总页数 221
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号