The supramolecular effect of stilbenophanes on the Wacker oxidation progress: A structure–activity relationship study
摘要:
The Wacker oxidation of cis and trans isomers of two defined stilbenophanes with different alkyl chain lengths gave the corresponding cyclic ketones in different rate. It was found that the oxidation rate of stilbenophanes is in order to: E-1 >> Z-3 similar to Z-1 > E-3 to show the importance of supramolecular effect of trans isomers in elucidation of the reaction mechanism. Cyclic voltammetry and Uv-Vis measurements showed a different behavior for the complexation of trans isomers with palladium ion to confirm the Wacker oxidation data. (C) 2015 Elsevier B.V. All rights reserved.
Rhodium(II)-Catalyzed Cyclization of Bis(N-tosylhydrazone)s: An Efficient Approach towards Polycyclic Aromatic Compounds
作者:Ying Xia、Zhenxing Liu、Qing Xiao、Peiyuan Qu、Rui Ge、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201201374
日期:2012.6.4
Ahead of the PAC: Polycyclicaromaticcompounds (PACs) can be easily accessed by the combination of Suzuki–Miyaura cross‐coupling and a [Rh2(OAc)4]‐catalyzed carbene reaction using easily available bis(N‐tosylhydrazone)s as intermediates (see scheme; Ts=4‐toluenesulfonyl).
The Wacker oxidation of cis and trans isomers of two defined stilbenophanes with different alkyl chain lengths gave the corresponding cyclic ketones in different rate. It was found that the oxidation rate of stilbenophanes is in order to: E-1 >> Z-3 similar to Z-1 > E-3 to show the importance of supramolecular effect of trans isomers in elucidation of the reaction mechanism. Cyclic voltammetry and Uv-Vis measurements showed a different behavior for the complexation of trans isomers with palladium ion to confirm the Wacker oxidation data. (C) 2015 Elsevier B.V. All rights reserved.