Reported herein is a novel visible‐light photoredox system with Pd(PPh3)4 as the sole catalyst for the realization of the first direct cross‐coupling of C(sp3)−H bonds in N‐aryl tetrahydroisoquinolines with unactivated alkyl bromides. Moreover, intra‐ and intermolecular alkylations of heteroarenes were also developed under mild reaction conditions. A variety of tertiary, secondary, and primary alkyl
Bi(III) halides as efficient catalysts for the O-acylative cleavage of tetrahydrofurans: an expeditious entry to tetralins
作者:Simon J. Coles、James F. Costello、William N. Draffin、Michael B. Hursthouse、Simon P. Paver
DOI:10.1016/j.tet.2005.02.080
日期:2005.5
O-acylative cleavage of tetrahydrofurans using organic acid halides with catalytic Bi(III) halides is reported. X-ray crystallography is used to rationalise the failure of the reaction in the case of certain crowded acid chlorides, and a useful aspect of chemoselectivity is revealed. The synthetic potential of this reaction is illustrated with a highly efficient O-acylative cleavage/intramolecular
Various cyclic and acyclic ethers are efficiently cleaved with acyl chlorides or bromides to give ω-chloro- or ω-bromoesters under high-pressure conditions.
[EN] METABOTROPIC GLUTAMATE RECEPTOR POSITIVE ALLOSTERIC MODULATORS (PAMS) AND USES THEREOF<br/>[FR] MODULATEURS ALLOSTÉRIQUES POSITIFS (PAM) DU RÉCEPTEUR MÉTABOTROPIQUE DU GLUTAMATE ET LEURS UTILISATIONS
申请人:SANFORD BURNHAM MED RES INST
公开号:WO2015157187A1
公开(公告)日:2015-10-15
Provided herein are small molecule active metabotropic glutamate subtype-2 and -3 receptor positive allosteric modulators (PAMS), compositions comprising the compounds, and methods of using the compounds and compositions comprising the compounds.
Palladium(II) acetate catalyzed acylative cleavage of cyclic and acyclic ethers under neat conditions
作者:Jean Fotie、Brandy R. Adolph、Shreya V. Bhatt、Casey C. Grimm
DOI:10.1016/j.tetlet.2017.10.080
日期:2017.12
During the development of a palladiumcatalyzed C–H activation cross-coupling reaction involving acyl halides, it was noted that palladium(II) acetate catalyzes the acylative cleavage of tetrahydrofuran (used as a solvent) at room temperature to afford the corresponding 4-chlorobutyl ester derivative. After optimization, the reaction was shown to work well with epoxides, oxetane and tetrahydrofuran