Visible light-mediated oxidative quenching reaction to electron-rich epoxides: highly regioselective synthesis of α-bromo (di)ketones and mechanism study
作者:Lin Guo、Chao Yang、Lewei Zheng、Wujiong Xia
DOI:10.1039/c3ob41245h
日期:——
A novel and simple procedure was developed for the regioselective synthesis of α-bromo (di)ketones from electron-rich epoxides viavisiblelightphotoredoxcatalysis. Through optimization of solvent and light source, the reaction can be rapidly achieved under mild conditions. Moreover, the possible reaction mechanism was proposed and further supported by control experiments.
Electro‐Olefination—A Catalyst Free Stereoconvergent Strategy for the Functionalization of Alkenes
作者:Andreas N. Baumann、Arif Music、Jonas Dechent、Nicolas Müller、Thomas C. Jagau、Dorian Didier
DOI:10.1002/chem.202001394
日期:2020.7.8
Conventional methods carrying out C(sp2)−C(sp2) bondformations are typically mediated by transition‐metal‐based catalysts. Herein, we conceptualize a complementary avenue to access such bonds by exploiting the potential of electrochemistry in combination with organoboron chemistry. We demonstrate a transition metal catalyst‐free electrocoupling between (hetero)aryls and alkenes through readily available
The first asymmetricepoxidation of isolated carbon–carbon double bonds using an Fe(III)‐centered chiral salen complex is described. This is the first example of novel asymmetric space construction for a catalyst that exploits the intramolecular fluorophilic effect of fluorous tags.
5- substituted tetralones as inhibitors of ras farnesyl trransferase
申请人:——
公开号:US20040044057A1
公开(公告)日:2004-03-04
The present invention provides novel 5-substituted tetralones of Formulas (I), (II), (III) and (IV) and pharmaceutically acceptable salts, esters, amides, and prodrugs thereof, which are useful for treating and preventing uncontrolled or abnormal proliferation of tissues, such as cancer, atherosclerosis, restenosis, and psoriasis. Specifically, the present invention relates to compounds that inhibit the farnesyl transferase enzyme.
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Enantioselective epoxidation of olefins with hydrogen peroxide catalyzed by bioinspired aminopyridine manganese complexes derived from L-proline
作者:Wenfang Wang、Qiangsheng Sun、Chungu Xia、Wei Sun
DOI:10.1016/s1872-2067(18)63116-x
日期:2018.9
Three chiral aminopyridine ligands derivedfrom L-proline were prepared. Careful evaluation of the corresponding aminopyridine manganese complexes in asymmetric epoxidation of olefins revealed a broad substrate scope in the presence of 0.2 mol% manganese complex and 0.5 equiv. 2,2-dimethylbutyric acid, with aqueous hydrogen peroxide as an oxidant. A variety of olefins including styrenes, chromenes, and