Metal-Free Synthesis and Photophysical Properties of 1,2,4-Triarylpyrroles
作者:Dan Chang、Jinjin Chen、Yong Liu、Huawen Huang、Anjun Qin、Guo-Jun Deng
DOI:10.1021/acs.joc.0c01788
日期:2021.1.1
4-triaryl-substituted pyrrole products were obtained in good to high yields. Furthermore, 2,3,5-triaryl-substituted pyrroles were selectively formed in the absence of nitrovinylarenes. The photophysicalproperties of some pyrrole products have been investigated to show good aggregation-induced emission (AIE) activity.
Copper-catalyzed oxidative alkenylation of C(sp<sup>3</sup>)–H bonds via benzyl or alkyl radical addition to β-nitrostyrenes
作者:Shengrong Guo、Yanqin Yuan、Jiannan Xiang
DOI:10.1039/c4nj02416h
日期:——
A new method for the preparation of (E)-β-alkylstyrene derivatives has been developed via the addition of a benzyl or alkyl radical to β-nitrostyrenes using di-tert-butyl peroxide (DTBP) as the oxidant in the presence of Cu powder catalyst. The C–H bonds in various toluene derivatives, ethers, alkanes and alcohols were successfully converted into C–C bonds to yield the corresponding (E)-β-alkylstyrene
Highly efficient bifunctional organocatalysts for the asymmetric Michael addition of ketones to nitroolefins
作者:Chuanming Yu、Jun Qiu、Fei Zheng、Weihui Zhong
DOI:10.1016/j.tetlet.2011.04.067
日期:2011.6
A type of secondary–secondary–tertiary triamine bifunctionalorganocatalysts have been properly designed and synthesized. In our study, the designed catalyst (S)-N-(pyrrolidin-2-ylmethyl)pyridin-2-amine 5 has been shown to be highly efficient to promote the asymmetric Michaeladdition of ketones to nitroolefins at room temperature, which afforded the corresponding adducts in excellent diastereoselectivities
Asymmetric Oxidations
of Electron-Poor Alkenes Promoted by the β-Amino Alcohol/TBHP
System
作者:Alessandra Lattanzi、Alessio Russo
DOI:10.1055/s-0029-1216638
日期:——
the enantioselective organocatalyzed oxidation of electron-poor alkenes. Readily or commercially available β-amino alcohols displayed catalytic activity in the asymmetric epoxidation of α,β-enones and β-peroxidation of nitroalkenes with tert-butyl hydroperoxide (TBHP) as the oxidant. The corresponding epoxides and peroxides were isolated in good to high yield and enantioselectivity. α,β-enones - epoxides