Starting from known Src SH2 inhibitors incorporating five-membered heterocycles or benzamide scaffolds, we prepared tetra substituted imidazole compounds able to interact with the pY, pY + 1 and pY + 3 binding sites of the Src SH2 protein. The synthesis and biological data are presented. (C) 2002 Elsevier Science Ltd. All rights reserved.
[EN] PROTEASOME INHIBITING ß-LACTAM PRODRUGS USEFUL FOR THE TREATMENT OF CANCER AND NEURODEGENERATIVE DISORDERS [FR] PROMÉDICAMENTS À BASE DE SS-LACTAME INHIBITEURS DU PROTÉASOME UTILES POUR LE TRAITEMENT DU CANCER ET DE TROUBLES NEURODÉGÉNÉRATIFS
Incorporation of Sulfur Dioxide into the Products of Reaction ofSchiff Bases with Halo- or Alkylthio-ketenes in Liquid SO2. Preliminary communication
作者:Daniel Bellu?
DOI:10.1002/hlca.19750580832
日期:1975.11.5
A simple ‘three-component-reaction’ between halo- or alkylthio-ketenes, Schiff bases and sulfurdioxide, yielding 4-oxo-1,3-thiazolidine-1,1-dioxides 4 in one step, is presented.
transformation of a wide variety of alcohols or carboxylic acids into the corresponding halides. Yields are high and conditions are very mild thus allowing for the presence of sensitive functional groups. The reagents can be easily tuned allowing therefore the selective monohalogenation of polyhydroxylated molecules. The scope and chemoselectivity of the reactions have been studied and reaction mechanisms
Tandem Pummerer/Mannich Cyclization Cascade of α-Sulfinylamides as a Method To Prepare Aza-Heterocycles
作者:Albert Padwa、Todd M. Heidelbaugh、Jeffrey T. Kuethe、Michael S. McClure、Qiu Wang
DOI:10.1021/jo020083x
日期:2002.8.1
particularly suited for the assembly of natural product scaffolds. Some preliminary studies were directed toward both mesembrine and deethylibophyllidine. When the model Z-enamido sulfoxide 33 was heated with p-TsOH, a 80% yield of tosylate 34 was obtained as a single diastereomer. In this case, the carbocation intermediate derived from cyclization onto the terminal pi-bond was trapped with p-TsOH from the least
Proteasome inhibiting β-lactam prodrugs useful for the treatment of cancer and neurodegenerative disorders
申请人:Vita Api
公开号:US11053249B2
公开(公告)日:2021-07-06
The present invention relates generally to proteasome inhibiting β-lactam compounds useful for the treatment of cancer and neurodegenerative disorders. The invention also provides pharmaceutical compositions and extended release formulations of said compounds, and medical uses of said compounds and/or pharmaceutical compositions to treat cancer and neurodegenerative disorders.
Regiochemical and stereochemical studies on halocyclization reactions of unsaturated sulfides
作者:Xiao-Feng Ren、Edward Turos、Charles H. Lake、Melvyn Rowen Churchill
DOI:10.1021/jo00125a038
日期:1995.10
The regiochemistry and stereochemistry for the halocyclization reactions of unsaturated benzyl sulfides have been examined as a function of tether length, type of unsaturation (carbon-carbon double bond versus carbon-carbon triple bond), substituents, and halogenating agent. Alkenyl sulfides were found to react with iodine or bromine at room temperature to give five-membered ring cycloadducts exclusively over those having four-membered rings, while for larger systems, six-membered ring products are formed preferentially over their five-membered ring isomers and exclusively over the seven-membered ring adducts. The endo- versus exo-regioselectivity of these alkenyl sulfide ring closures most likely reflects the difference in thermodynamic stabilities of the beta-halo sulfide cycloadducts, which are able to equilibrate via a common episulfonium intermediate. The efficiency of the cyclization process markedly drops off for these alkenyl sulfides as the tether length increases beyond four intervening carbon centers. Thus, while the halogenations of 3-butenyl sulfides and 4-pentenyl sulfides give high yields of cycloadducts, those of 5-hexenyl sulfides afford only small amounts of cyclized products and large quantities of acyclic dibromides. Conversely the reactions of acetylenic sulfides with iodine give uniformly high yields and regiochemical control regardless of the tether length. Thus, 3-butynyl and 4-pentynyl sulfides cyclize cleanly to the five-membered ring while 5-hexynyl sulfides give exclusively the six-membered ring, The products arising from these alkynyl sulfide ring closures are believed to be formed under kinetic control. The methodology has been applied to the synthesis of unusual bicyclic beta-lactams related to the penicillin family of antibiotics.