Manganese-Catalyzed <i>N</i>-Alkylation of Sulfonamides Using Alcohols
作者:Benjamin G. Reed-Berendt、Louis C. Morrill
DOI:10.1021/acs.joc.9b00203
日期:2019.3.15
An efficient manganese-catalyzed N-alkylation of sulfonamides has been developed. This borrowing hydrogen approach employs a well-defined and bench-stable Mn(I) PNP pincer precatalyst, allowing benzylic and simple primary aliphatic alcohols to be employed as alkylating agents. A diverse range of aryl and alkyl sulfonamides undergoes mono-N-alkylation in excellent isolated yields (32 examples, 85% average
A novel rhenium complex1 bearing a non-innocent PNP pincer ligand was prepared. This novel catalyst is active in hydrogen autotransfer reactions to form new C-C and C-N bonds. More specifically,...
Keteniminium‐Driven Umpolung Difunctionalization of Ynamides
作者:Shubham Dutta、Shengwen Yang、Rajeshwer Vanjari、Rajendra K. Mallick、Vincent Gandon、Akhila K. Sahoo
DOI:10.1002/anie.201915522
日期:2020.6.26
synthesis of novel triaryl‐substituted enamides is described. This transformation represents the first example of an umpolung regioselective unsymmetrical syn ‐1,2‐diarylation/aryl‐olefination of ynamides. The aryl moieties of the diazonium salt (electrophile) and boronic acid (nucleophile) are explicitly incorporated in the electrophilic α‐ and nucleophilic β‐position, respectively, of the ynamide
Zirconocene chloride hydride (Schwartz′s reagent) can reduce aromatic and aliphatic aldimines as well as ketimines. The reaction is fast (completed in 20 min) and chemoselective. It tolerates a range of functional groups and affords corresponding N‐protected amines in high yields.
[EN] THIENYL-, FURYL-, PYRROLYL- AND BIPHENYLSULFONAMIDES AND DERIVATIVES THEREOF THAT MODULATE THE ACTIVITY OF ENDOTHELIN<br/>[FR] THIENYL-, FURYL-, PYRROLYL- ET BIPHENYL SULFONAMIDES ET LEURS DERIVES MODULANT L'ACTIVITE DE L'ENDOTHELINE
申请人:TEXAS BIOTECHNOLOGY CORPORATION
公开号:WO1996031492A1
公开(公告)日:1996-10-10
(EN) Thienyl-, furyl- and pyrrolyl-sulfonamides and methods for modulating or altering the activity of the endothelin family of peptides are provided. In particular, N-(isoxazolyl)thienylsulfonamides, N-(isoxazolyl)-furylsulfonamides and N-(isoxazolyl)pyrrolylsulfonamides and methods using these sulfonamides for inhibiting the binding of an endothelin peptide to an endothelin receptor by contacting the receptor with the sulfonamide are provided. Methods for treating endothelin-mediated disorders by administering effective amounts of one or more of these sulfonamides or prodrugs thereof that inhibit or increase the activity of endothelin are also provided.(FR) Thiényl-, furyl- et pyrrolyl-sulfonamides et procédés de modulation ou d'altération de l'activité de la famille endothéline des peptides. L'invention porte en particulier sur des N-(isoxazolyl)thiényl sulfonamides, N-(isoxazolyl)-furyl sulfonamides et N-(isoxazolyl)pyrrolyl sulfonamides et sur des procédés mettant en oeuvre de tels sulfonamides pour inhiber la liaison d'un peptide d'entholéline à un récepteur d'endothéline en soumettant ce récepteur au contact du sulfonamide. L'invention porte également sur des méthodes de traitement des affections à médiation par l'endothéline par administration de quantités efficaces d'un ou plusieurs de ces sulfonamides ou de promédicaments issus de ces sulfonamides inhibant ou accroissant l'activité de l'endothéline.