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- SAA ligand Lh could induce asymmetric addition of terminal alkyne to aldehydes without using air-sensitive Ti(O~iPr)4and expensive Zn(OTf)2.with good result of high yield (up to 99%) and good enantioselectivities (up to 84%ee). 将SAA配体Lh应用于在无Ti(O~iPr)_4和Zn(OTf)_2的条件下促进端基炔对醛的不对称加成反应中,反应的收率普遍较高,最高达99%25,对映体选择性高达84%25ee。
- Keywords terminal alkyne;dimerization reaction;enyne;selectivity; 末端炔烃;二聚反应;烯炔化合物;选择性;
- Keywords cesium hydroxide;terminal alkyne;iodoalkyne; 氢氧化铯;端炔;炔基碘;
- Progress in a variety of catalytic systems-catalyzed dimerizations of terminal alkynes to synthesize enynes is summarized. 摘要综述了不同催化体系催化末端炔烃二聚反应合成共轭烯炔化合物的研究进展。
- However, alkyl-substituted propargylic dithioacetals could be synthesized by the displacement reaction of the corresponding terminal alkynes with alkyl iodides. 烷基取代的炔丙基硫缩酮衍生物,则能利用相对应的末端炔和碘烷亲电基进行取代反应所获得。
- Here we proposed two novel reaction methods employing polyethyleneglycol (PEG) or ionic liquid (IL) as the reaction media for homocoupling of terminal alkynes, which was also called Glaser reaction. 本文首次研究了以环境友好的PEG(聚乙二醇)和离子液为介质的端炔均偶联(Glaser)反应。
- Keywords supercritical carbon dioxide;Pd catalyze;oxidative coupling;terminal alkyne;diyne; 超临界二氧化碳;钯催化;氧化偶联反应;末端炔烃;二炔化合物;
- Keywords organic hypervalent iodo-heterocyclic compound;palladium-copper catalyst;terminal alkyne;chemoselectivity cross-coupling; 有机高价碘杂环;钯铜催化剂;末端炔烃;化学选择性偶联反应;
- I'll keep with you to the bus terminal. 我陪你到公共汽车终点站。
- Please wait for me at the bus terminal. 请在公共汽车终点站等我。
- He took the airport bus to the city terminal. 他坐机场的交通车到市区集散站。
- We got off at the terminal station. 我们在终站下车。
- The data will be fed into the computer terminal. 数据将输入电脑终端。
- He is suffering from terminal cancer. 他患晚期癌症。
- The current flows out of the output terminal. 电流从输出电极流出。
- Passengers are conveyed by bus to the air terminal. 用公车载送旅客前往航空站。
- The truck blasted toward the terminal. 卡车向终点疾驰。
- A terminal in a computer network. 终端计算机网状系统的末端
- terminal alkyne 末端炔烃
- Introduction to the Alkyne Triple Bond. 炔烃三键介绍。