Chemoselective mono halogenation of β-keto-sulfones using potassium halide and hydrogen peroxide; synthesis of halomethyl sulfones and dihalomethyl sulfones
摘要:
The synthesis of alpha-halo beta-keto-sulfones using potassium halide and hydrogen peroxide as a chemoselective mono halogenation reagent and the synthesis of alpha, alpha-symmetrical and asymmetrical dihalo beta-keto-sulfones and alpha-halo, alpha-alkyl and beta-keto-sulfones is described. Base induced cleavage of alpha-halo beta-keto-sulfones, alpha,alpha-dihalo beta-keto-sulfones, and alpha-halo, alpha-alkyl beta-keto-sulfones afforded the corresponding halomethyl sulfones, dihalomethyl sulfones and haloalkyl sulfones. (c) 2006 Elsevier Ltd. All rights reserved.
Vicarious nucleophilic substitution of hydrogen in nitroderivatives of five-membered heteroaromatic compounds
作者:Mieczyslaw Makosza、Ewa Kwast
DOI:10.1016/0040-4020(95)00445-e
日期:1995.7
Nitro derivatives of thiophene, furan and pyrrole react with carbanions containing leaving groups giving products of replacement of hydrogen with functionalized alkyl substituents. Many specific features of this reaction are discussed.
Nickel-catalyzed asymmetric reductive arylation of α-chlorosulfones with aryl halides
作者:Deli Sun、Guobin Ma、Xinluo Zhao、Chuanhu Lei、Hegui Gong
DOI:10.1039/d1sc00283j
日期:——
We report an asymmetric Ni-catalyzed reductive cross-coupling of aryl/heteroaryl halides with racemic α-chlorosulfones to afford enantioenriched sulfones. The reaction tolerates a variety of functional groups under mild reaction conditions, which complements the current methods. The utility of this work was demonstrated by facile late-stage functionalization of commercial drugs.
Vicarious Nucleophilic Substitution of Hydrogen in Nitrobenzoic Acids
作者:M. Makosza、S. Ludwiczak
DOI:10.1055/s-1986-33420
日期:——
The vicarious nucleophilic substitution of hydrogen in three isomeric nitrobenzoic acids 2-4 was studied. The negatively charged carboxylate anion substituent does not disturb the reaction course which proceeds with good to moderate yields to give products 6 and 7.
Vicarious nucleophilic substitution of hydrogen in electrophilic alkenes
作者:Mieczysłlaw Ma̧kosza、Andrzej Kwast
DOI:10.1016/s0040-4020(01)80963-7
日期:1991.1
Carbanions containing leaving groups react in the presence of base with electrophilicalkenes giving products in which vinylic hydrogen is replaced with the carbanion moiety. They are formed via addition - β-elimination pathway analogous to the vicarious nucleophilicsubstitution in nitroarenes. In some cases, however, the cyclization - ring opening process takes place instead.
[EN] NR2B-SELECTIVE NMDA-RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RÉCEPTEURS NMDA SÉLECTIFS DU SITE NR2B
申请人:UNIV MUENSTER WILHELMS
公开号:WO2010122134A1
公开(公告)日:2010-10-28
The present invention relates to compounds according to general formula (I) and pharmaceutical compositions comprising compounds according to general formula (I).