Xanthate-mediated synthesis of (<i>E</i>)-alkenes by semi-hydrogenation of alkynes using water as the hydrogen donor
作者:Xianglin Luo、Xiuwen Chen、Lu Chen、Kun Zhang、Yibiao Li
DOI:10.1039/c9cc00128j
日期:——
Semi-hydrogenation of alkynes is one of the most widely used methods for obtaining alkenes in laboratory preparation and in industry. Transition metal catalysts have been extensively studied for this transformation, but the tolerance of functional groups, such as pyridine, –OH, –NH2, –Bpin, and halides, and the toxicity of the trace amount of transition metal catalysts are still highly challenging
The present invention relates to the improvement of blue-emitting organic electroluminescent devices comprising stilbenamines, and to materials for the production of these electroluminescent devices.
Target directed chemotherapy of tumours of the sexual organs
申请人:Forster Heinz
公开号:US20070099876A1
公开(公告)日:2007-05-03
The invention relates to dialkyltriazene-bearing estrogens and anti-estrogens that are suited for use as chemotherapeutic drugs for treating carcinomas of the sexual organs of humans and animals.
Substituent effects on the <sup>13</sup>
C NMR chemical shifts of the imine carbon in <i>N</i>
-(4-X-benzylidene)-4-(4-Y-styryl) anilines
作者:Zhengjun Fang、Chenzhong Cao、Guanfan Chen
DOI:10.1002/poc.3032
日期:2012.12
Long‐range electronic substituenteffects were targeted using the substituent dependence of δC(C═N), and specific cross‐interactions were explored extendedly. A wide set of N‐(4‐X–benzylidene)‐4‐(4‐Y–styryl) anilines, p‐X–C6H4CH═NC6H4CH═CHC6H4–p‐Y (X = NMe2, OMe, Me, H, Cl, F, CN, or NO2; Y = NMe2, OMe, Me, H, Cl, or CN) were prepared for this study, and their 13C NMR chemicalshifts δC(C═N) of C═N bonds
使用δC(C effectsN)的取代基依赖性来靶向远程电子取代基效应,并广泛地探索了特定的交叉相互作用。宽组ñ - (4-X -亚苄基)-4-(4--Y-苯乙烯基)苯胺,p -X-C 6 H ^ 4 CH═NC 6 ħ 4 CH = CHC 6 H ^ 4 - p -Y( X = NMe 2,OMe,Me,H,Cl,F,CN或NO 2; Y = NMe 2,OMe,Me,H,Cl或CN)用于本研究,并进行13 C NMR化学位移δ ç测定了C═N键的(C═N)。结果表明,取代基Y对两个电感和共振效应δ Ç的(C = N)p -X-C 6 H ^ 4 CH═NC 6 ħ 4 CH = CHC 6 H ^ 4 - p -Y不太比那些取代基的Y p -X-C 6 H ^ 4 CH═NC 6 ħ 4 - p‐Y。此外,随着共轭链的长度延长,C = N功能的电子特性对通过取代基X或Y的电子给予/电