Novel strategies for the solid phase synthesis of substituted indolines and indoles
摘要:
Using a polymer-bound selenenyl bromide resin, o-allyl and o-prenyl anilines were cycloaded to afford a series of solid-supported indoline and indole scaffolds. These scaffolds were then functionalized and cleaved via four distinct methods, namely traceless reduction, radical cyclization, radical rearrangement, and oxidative elimination, to afford 2-methyl indolines, polycyclic indolines, 2-methyl indoles, and 2-propenyl indolines, respectively. A number of small combinatorial libraries of compounds reminiscent of certain designed ligands of biological interest were constructed demonstrating the potential utility of the developed methodology to chemical biology studies and the drug discovery process. (C) 2002 Elsevier Science Ltd. All rights reserved.
Oxidative Diamination of Alkenes with Ureas as Nitrogen Sources: Mechanistic Pathways in the Presence of a High Oxidation State Palladium Catalyst
作者:Kilian Muñiz、Claas H. Hövelmann、Jan Streuff
DOI:10.1021/ja075041a
日期:2008.1.1
identical mechanism where stereochemistry is concerned. It exemplifies the importance of cationic palladium(IV) intermediates prior to the final reductiveeliminationfrom palladium and proves that the nucelophile for this step stems from the immediate coordination sphere of the palladium(IV) precursor. These results have important implications for the general development of alkene 1,2-difunctionalization
Enantioselective Synthesis of 2-Bromomethyl Indolines via BINAP(S)-Catalyzed Bromoaminocyclization of Allyl Aniline
作者:Sheng-Nan Yu、Yin-Long Li、Jun Deng
DOI:10.1002/adsc.201700106
日期:2017.7.17
An enantioselective bromoamination of allyl aniline with N‐bromosuccinimide (NBS) catalyzed by BINAP(S) (BINAP monosulfide) is described. This protocol could provide a range of chiral 2‐bromomethyl indolines in good to excellent yields with up to 87% ee. Furthermore, the resulting chiral 2‐bromomethyl indolines could be easily converted into synthetically useful chiral building blocks.
Metal–ligand bifunctional activation and transfer of N–H bonds
作者:Kilian Muñiz、Anton Lishchynskyi、Jan Streuff、Martin Nieger、Eduardo C. Escudero-Adán、Marta Martínez Belmonte
DOI:10.1039/c1cc10999e
日期:——
The concept of metalâligand bifunctionality can be employed for an efficient activation of NâH bonds by well-defined ruthenium amido complexes. An enantioselective catalytic aza-Michael reaction was developed on the basis of this process, which gives rise to indoline β-amino acids.
bearing a phenylurea moiety was applied to enantioselective bromoaminocyclization reactions of 2-allylaniline derivatives, which provide opticallyactive 2-substituted indoline products as important motifs for biologically active compounds. A protecting group on the nitrogen of the 2-allylaniline substrate was carefully optimized, and highly enantioselective reactions were achieved by employing the
[DE] POLYMERMISCHUNGEN, ENTHALTEND KOHLENMONOXID/ alpha -OLEFIN-COPOLYMERE UND COPOLYMERE AUS VINYLAROMATISCHEN VERBINDUNGEN UND VINYLCYANIDEN<br/>[EN] POLYMER MIXTURES CONTAINING CARBON MONOXIDE/ alpha -OLEFIN COPOLYMERS AND COPOLYMERS MADE OF VINYL AROMATIC COMPOUNDS AND VINYL CYANIDES<br/>[FR] MELANGES POLYMERES CONTENANT DES COPOLYMERES A BASE DE MONOXYDE DE CARBONE/ alpha -OLEFINE ET DES COPOLYMERES A BASE DE COMPOSES VINYLAROMATIQUES ET DE CYANURES DE VINYLE
申请人:BASF AKTIENGESELLSCHAFT
公开号:WO1999058607A1
公开(公告)日:1999-11-18
(DE) Polymermischungen aus Kohlenmonoxidcopolymeren und Copolymeren aus vinylaromatischen Verbindungen und Vinylcyaniden sowie Verfahren zu deren Herstellung und deren Verwendung als Fasern, Folien, Formkörper oder Beschichtungen.(EN) The invention relates to polymer mixtures consisting of carbon monoxide copolymers and copolymers made of vinyl aromatic compounds and vinyl cyanides. The invention also relates to a method for producing same and to their use as fibres, films, moulded bodies or coatings.(FR) L'invention concerne des mélanges polymères à base de copolymères de monoxyde de carbone et de copolymères issus de composés vinylaromatiques et de cyanures de vinyle. L'invention concerne en outre des procédés permettant de les préparer et de les utiliser comme fibres, pellicules, corps moulés ou revêtements.