In this paper, (R)- and (S)-2,2'-diethynyl-1,1'-binaphthyl with highly stable chiral configurations were em- ployed as structural templates, and a new type of helical cyclophane compounds (R,P)-3 and (S,M)-3 were synthesized in enantiopure form by the introduction of benzyl sulfone through Sonogashira coupling reac- tion, followed by the treatment of disulfone with lithium diisopropylamide (LDA).
基于2,2'-二取代的联萘衍生物在手性构型上高度稳定的特点,分别从光学活性的(R)-和(S)-2,2'-二乙炔基-1,1'-联萘结构模板出发,通过Sonogashira偶连反应导入苄基砜,然后用二异丙基氨基锂(LDA)处理制得的联萘二砜成功地合成了一种新的螺旋环芳分子——对映异构体(R,P)-3和(S,M)-3。
formwork structure and installation technology of 60m precast box girder of Qingdao Gulf Bridge
青岛海湾大桥60m预制箱梁模板结构及安装施工技术
The domain structure template,which is a model for knowledge expression of scheme case in conceptual design,is constructed on this basis.
将行为信息引入公理化设计中 ,建立了扩展“之”字映射 ;在此基础上 ,构造了概念设计方案实例的知识表示模型———域结构模板 ;给出了基于域结构模板的多方案生成过程。
The models for knowledge representation, including domain structure template for a scheme and concept spa.
研究了计算机辅助概念设计中的关键技术———知识表示 将行为域引入公理化设计作为功能域和载体域之间的转换桥梁 ,针对该域结构定义扩展“之”字映射 ,建立了不同层次功能、行为和载体之间的映射关系 ;构造了概念设计方案的知识表示模型———域结构模板 ;针对一类产品的知识表示模型———概念空间 ,给出了基于概念空间的概念设计方案生成过程 最后以工业平缝机为例对所述模型和方法加以说
The concept of PDU structure template are advanced,structure of software and the flow chart of the key module are analyzed.
1语法分析、BER自动编解码系统功能,以及它在网络信令分析系统的应用前景进行了叙述,提出了PDU结构模板概念,分析了控件整体框架及重要模块的处理流程,并对进一步的应用研究及技术难点进行了讨论。
This engine uses two layer mapping(template maps to template structure tree,and template structure tree maps to XML schema).
该引擎采用两级映射(模板样式到模板结构树和模板结构树到XML架构),根据Excel模板自动生成XML架构和映射信息。
The Template-structure of Intelligence Long-distance Teaching By Agents
基于多Agent的智能远程教学的模板结构
Draw forming simulation and die-structure optimization of front fender
翼子板拉深成形模拟及模具结构优化
A COMMONLY-SIGHTED ROCK MASS STRUCTURE--SLAB-RENT STRUCTURE AND ITS MECHANICAL MODEL
一种常见的岩体结构——板裂结构及其力学模型
Big Distort Sheet-pile Wall Structure Numerical Simulation and Structural Property Analysis
大变位板桩墙结构的数值模拟与结构特性分析
Optimization Design on Mold Structure and Press Process of Conveyor Chain Boundary Plate
输送链附板结构、加工工艺与模具结构优化设计
Fabrication of Nano-porous SiC-based Ceramics Using Template Method;
模板法制备SiC基陶瓷纳米孔结构材料
Synthesis of Mesoporous Titania Using Templates and Its Structural Modifications;
介孔TiO_2的模板法合成及结构修饰研究
Polyaniline Nanotubes Obtained by Template Method;
模板法制备聚苯胺纳米管状结构材料
Simulate the Heating Stress of ROF Bottom Plate and Optimize the Structure;
ROF炉底板热应力模拟与结构优化
DNA-templated Formation of ZnO Nanoparticles Chains;
以DNA为模板合成氧化锌纳米链状结构
Structured Design Excellent Courseware Template In Authorware;
Authorware中结构化设计精品课件模板
The Mode Analysis and Position Selection of Perforated Panel Absorber
穿孔板吸声结构模态分析及位置选择
Assembly of ZnO Nano-Chains Based on DNA Template
DNA模板法组装氧化锌纳米链结构
Calculation model and Pushover analysis for a multi-ribbed slab structure
密肋壁板结构计算模型及Pushover分析
Reliability Analysis of Steel Tubular Support Under the Function
基于功能的模板支架结构可靠性分析
Large-span Structural Engineering Application of Highsupporting Wooden Template
大跨度结构工程高支撑木模板的应用
The application of shear wall structure steel large formwork construction technology
剪力墙结构钢制大模板施工技术应用
Comparative analysis of simplified computation models of a multi-ribbed slab structure
密肋壁板结构简化计算模型对比分析
