Switchable Selectivity in the Pd-Catalyzed Alkylative Cross-Coupling of Esters
作者:Jeanne Masson-Makdissi、Jaya Kishore Vandavasi、Stephen G. Newman
DOI:10.1021/acs.orglett.8b01646
日期:2018.7.6
The Pd-catalyzed cross-coupling of phenyl esters and alkyl boranes is disclosed. Two reaction modes are rendered accessible in a selective fashion by interchange of the catalyst. With a Pd–NHC system, alkyl ketones can be prepared in good yields via a Suzuki–Miyaurareaction proceeding by activation of the C(acyl)–O bond. Use of a Pd–dcype catalyst enables alkylated arenes to be synthesized by a modified
Synthesis of Alkyl Indium Reagents by Using Unactivated Alkyl Chlorides and Their Applications in Palladium-Catalyzed Cross-Coupling Reactions with Aryl Halides
An efficient method for the preparation of alkyl indium reagents by using unactivated and cheap alkyl chlorides as substrates in the presence of indium and LiI was developed. The thus-formed alkyl indium species effectively underwent palladium-catalyzed cross-couplingreactions with aryl halides with wide functional group tolerance.
Nickel-Catalyzed Cross-Electrophile Coupling of Aryl Chlorides with Primary Alkyl Chlorides
作者:Seoyoung Kim、Matthew J. Goldfogel、Michael M. Gilbert、Daniel J. Weix
DOI:10.1021/jacs.0c02673
日期:2020.6.3
Alkyl chlorides and aryl chlorides are among the most abundant and stable carbon electrophiles. Although their coupling with carbon nucleophiles is well developed, the cross-electrophile coupling of aryl chlorides with alkyl chlorides has remained a challenge. We report here the first general approach to this transformation. The key to produc-tive, selective cross-coupling is the use of a small amount
Bis-benzo or benzopyrido cyclohepta piperidene, piperidylidene and
申请人:Schering Corporation
公开号:US05422351A1
公开(公告)日:1995-06-06
Bis-benzo or benzopyrido piperidene, piperidylidene and piperazine compounds of the formula: ##STR1## and pharmaceutically acceptable salts thereof are disclosed, wherein Z represents --(C(R.sup.a).sub.2).sub.m --Y--(C(R.sup.a).sub.2).sub.n -- or ##STR2## The compounds of Formula I possess anti-allergic and anti-inflammatory activity. Methods for preparing and using the compounds are also described.
Ruthenium catalyzed β-selective alkylation of vinylpyridines with aldehydes/ketones <i>via</i> N<sub>2</sub>H<sub>4</sub> mediated deoxygenative couplings
作者:Leiyang Lv、Chao-Jun Li
DOI:10.1039/d0sc06586b
日期:——
aldehyde/ketones via N2H4 mediated deoxygenative couplings. Compared with one-electron umpolung of carbonyls to alcohols, this two-electron umpolung strategy realized reductive deoxygenation targets, which were not only applicable to the regioselective alkylation of a broad range of 2/4-alkene substituted pyridines, but also amenable to challenging 3-vinyl and steric-embedded internal pyridines as well as their