A mild and efficient one-pot visible light-induced method has been developed for the allylic oxidation. The oxidation of allylic systems has played a prominent role in this context as possibly the most widely applied C-H functionalization, owing to the utility of enones. The allylic C-H oxidation is relatively simple and predictable, even on a preparative scale, because active species generated at the allylic position are stabilized by the double bond.
Disclosed are compounds of Formula (I) or stereoisomers or salts thereof, wherein: X1, X2, X3, W, Q1, Q2, and G2 are defined herein. Also disclosed are methods of using such compounds as selective agonists for G protein-coupled receptor S1P1, and pharmaceutical compositions comprising such compounds. These compounds are useful in treating, preventing, or slowing the progression of diseases or disorders in a variety of therapeutic areas, such as autoimmune diseases and vascular disease.
This disclosure is directed to pyrido[4,3-b]indoles having rigid moieties. The compounds in one embodiment are pyrido[4,3-b]indoles having an unsaturated hydrocarbon moiety. The compounds in another embodiment are pyrido[4,3-b]indoles having a cycloalkyl, cycloalkenyl or heterocyclyl moiety. Pharmaceutical compositions comprising the compounds are also provided, as are methods of using the compounds in a variety of therapeutic applications, including the treatment of a cognitive disorder, psychotic disorder, neurotransmitter-mediated disorder and/or a neuronal disorder.
Nickel-catalyzed cross-couplings of cyclohexenyl phosphate and arylboronic acids
作者:Yang Nan、Zhen Yang
DOI:10.1016/s0040-4039(99)00517-1
日期:1999.4
The Nickel-catalyzedcross-coupling reaction of cyclohexenylphosphate with a variety of arylboronicacids is described here for the first time. This methodology opens the door to other palladium or nickel-catalyzed coupling reactions involving vinyl phosphates.
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
TEMPO-catalyzed Aerobic Oxygenation and Nitrogenation of Olefins via C═C Double-Bond Cleavage
作者:Teng Wang、Ning Jiao
DOI:10.1021/ja403824y
日期:2013.8.14
A novel TEMPO-catalyzed aerobic oxygenation and nitrogenation of hydrocarbons via C═C double-bond cleavage has been disclosed. The reaction employs molecular oxygen as the terminal oxidant and oxygen-atom source by metal-free catalysis under mild conditions. This method can be used for the preparation of industrially and pharmaceutically important N- and O-containing motifs, directly from simple and
已经公开了一种通过 C=C 双键裂解的新型 TEMPO 催化的碳氢化合物有氧氧化和氮化。该反应采用分子氧作为末端氧化剂和氧原子源,在温和条件下通过无金属催化进行。该方法可用于直接从简单易得的烃类制备工业和药学上重要的含 N 和 O 基序。