【摘 要】
：
A metal-free approach for the synthesis of 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles via sulfur/dimethyl sulfoxide-promoted oxida-tive cyclization of readily available trifluoroacetimidohydrazides with methylhetarenes has been developed.This transformat
【机 构】
：
Department of Chemistry,Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejia
论文部分内容阅读
A metal-free approach for the synthesis of 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles via sulfur/dimethyl sulfoxide-promoted oxida-tive cyclization of readily available trifluoroacetimidohydrazides with methylhetarenes has been developed.This transformation pro-ceeds in cascade sulfur-mediated generation of thioaldehyde,condensation,intramolecular cyclization and oxidative aromatization sequence.
其他文献
以某钻井船为研究对象,应用CFD方法对钻井船船舶阻力性能、自由液面兴波、船体绕流场等进行数值模拟与分析,采用稳态计算方法与瞬态计算方法对大月池开口钻井船的流场特性预报差异进行详细分析.为验证计算网格与数值模型的准确性,以国际标模KVLCC2为基准对数值计算方法进行验证.通过对比研究等形成适用于大月池开口钻井船阻力及流场数值预报的方法和流程.
Co-culturing the mangrove endophytic fungus Penicillium sclerotiorum THSH-4 with Penicillium sclerotiorum ZJHJJ-18 in PDB medium resulted in the production of nine new azaphilones derivatives,peniazaphilones A—I (1-9),and six known azaphilones derivatives
研究某起重铺管船尾部托管架和起重机在波浪中联合工作状态下的水动力性能.利用水动力分析软件,采用基于势流理论和莫里森经验公式的数值方法,分别针对该船在有/无托管架联合作业状态和起重机有/无钩载状态下的水动力性能进行频域内数值分析.通过对比得到在实际起重作业海况下托管架对该船垂荡、横摇和纵摇运动响应的影响.结果 表明,托管架对该船在波浪中的运动性能起到积极的作用.所作研究为以后本船在实际工程中采用这种新型作业模式提供指导.
研究一套应用于海洋工程的虚拟仿真系统,此仿真系统由软件Vortex和Vega Prime的应用程序编程接口(Application Programming Interface,API)函数共同开发.使用三维建模软件Creator建立几何与地理模型,并建立基于Vortex的碰撞检测和动态响应的物理模型.完成仿真系统的总体架构和硬件平台与软件平台的搭建,详述船-缆-体多体耦合系统仿真整体流程,结合海底管道终端(Pipeline End Termination,PLET)海上安装实例阐述仿真系统的操作流程.该虚
在采用纵向滑移方法把大型组块从驳船回拖至某船厂码头作业过程中,为确保码头钢筋混凝土承台结构的安全性,针对码头滑道开展载荷监测研究.在承台上方滑道的水泥滑块上布置应变片传感器,通过有限元分析建立应变与滑块垂向载荷间的力学关系,实时监测回拖过程滑道载荷响应.结果 表明,当组块第3横梁从驳船进入码头滑道时,滑块垂向载荷出现最大值.监测方法可用于指导组块回拖或装船作业.
Stimuli-responsive molecules are highly desirable in different scenario such as smart materials,bio-imaging,and environment moni-toring.Herein,a series of hetero polycycles which show optical response toward chemical stimuli are synthesized from trithiasu
Based on the redox reactions of Togni-Ⅱ reagent and thiols,a thiol-tuned selective functionalization of unactivated olefins was dis-closed.In combination with aryl thiols,stoichiometric amount of Togni-Ⅱ reagent prompted a hydrotrifluoromethylation of alk
Pillar[5]arene-based supramolecular polymer gels (SPGs) show broad application prospects.To investigate the influence of the su-pramolecular monomers\' structure on the assembly and properties of corresponding pillar[5]arene-based SPGs,a series of mono-
针对半潜式平台波浪砰击问题,提出砰击分析流程,并针对波浪砰击的局部完整性,阐明砰击时间历程法与楔形块入水法两种砰击强度分析方法的基本原理、校核准则及适用范围.以某半潜式钻井平台为例,对两种波浪砰击分析方法进行对比验证,阐明各自的优缺点,给出半潜式平台侧板砰击与底板砰击所适用的分析方法.这些方法可为设计人员和操作人员提供有用的指导.
The reaction of a cyclic osmacarbyne complex with sodium azide led to the formation of a ring expansion-annulation product,a unique tetrazole annulated polycyclic metallacycle.The reaction proceeds by insertion of a nitrogen atom into the metal carbon tri