Copper-Catalyzed Three-Components Intermolecular Alkylesterification of Styrenes with Toluenes and Peroxyesters or Acids
作者:Ying-Xia Dong、Yang Li、Chang-Cheng Gu、Shuai-Shuai Jiang、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/acs.orglett.8b03330
日期:2018.12.7
A simple protocol for the three-component intermolecular alkylesterification of styrenes with toluenes and peroxyesters using a copper catalyst is described. A variety of ester-containing complex compounds were synthesized with excellent functional group tolerance and step efficiency. Employing the combination of carboxylic acids and di-tert-butyl peroxide (DTBP) oxidant instead of peroxyesters also
Temperature-controlled solvent-free selective synthesis of tert-butyl peresters or acids from benzyl cyanides in the presence of the TBHP/Cu(OAc)<sub>2</sub> system
作者:H. Hashemi、D. Saberi、S. Poorsadeghi、Kh. Niknam
DOI:10.1039/c6ra27921j
日期:——
tert-butyl peresters was achieved via copper-catalyzed oxidative-coupling of benzyl cyanides with tert-butyl hydroperoxide in short reaction times. Various derivatives of tert-butyl peresters were synthesized by this pathway in good to excellent yields. Further investigation revealed that the above-mentioned protocol is effective for the synthesis of benzoic acid derivatives when the reaction is conducted
acids 7 (via 6-[(butylsulfanyl)methylene] and epoxide derivatives), one of which furnished hexalone derivative 11 (via an intermediate diazomethyl ketone derivative). The above-mentioned starting esters were converted to ethylene ketals, the free-radical oxidations of which led to hydrobenzofuran acids. One of the latter led to a hydrindanone (via a diazomethyl ketone), whose further chemical elaboration
Rhodium(III)-Catalyzed C–H Activation/Alkyne Annulation by Weak Coordination of Peresters with O–O Bond as an Internal Oxidant
作者:Jiayu Mo、Lianhui Wang、Xiuling Cui
DOI:10.1021/acs.orglett.5b02291
日期:2015.10.16
A redox-economic strategy has been developed, involved in an efficient Rh(III)-catalyzed oxidative C–H activation and alkyneannulation with perester as the oxidizing directing group. In this process, the cleavage of an oxidizing O–O bond as an internal oxidant is described for the first time. This reaction could be carried out under mild conditions and exhibits excellent regioselectivity and wide
Efficient copper(<scp>i</scp>)-catalyzed oxidative intermolecular 1,2-estersulfenylation of styrenes with peroxyesters and disulfides
作者:Yiting Luo、Rongkui Su、Hongming Yang
DOI:10.1039/d0ob00823k
日期:——
the synthesis of thio-substituted esters throughcopper(I)-catalyzed intermolecular 1,2-estersulfenylation of styrenes with peroxyesters and disulfides was developed. In this transformation, two new C–S bond and C–O bond were constructed simultaneously under a copper catalyst system, and the transformation exhibits a broad substrate scope and good functional group compatibility. In addition, this method