26385-07-9Relevant articles and documents
Dual H-bond activation of NHC-Au(i)-Cl complexes with amide functionalized side-arms assisted by H-bond donor substrates or acid additives
Sepp?nen, Otto,Aikonen, Santeri,Muuronen, Mikko,Alamillo-Ferrer, Carla,Burés, Jordi,Helaja, Juho
supporting information, p. 14697 - 14700 (2020/12/02)
Novel approach with amide-tethered H-bond donor NHC ligands enabled Au(i)-catalysis via H-bonding. The plain NHC-Au(i)-Cl complex catalysed conversions of terminal N-propynamides to oxazolines, and enyne cycloisomerization with an acid additive, in DCM at
Formamides as Lewis Base Catalysts in SNReactions—Efficient Transformation of Alcohols into Chlorides, Amines, and Ethers
Huy, Peter H.,Motsch, Sebastian,Kappler, Sarah M.
, p. 10145 - 10149 (2016/08/16)
A simple formamide catalyst facilitates the efficient transformation of alcohols into alkyl chlorides with benzoyl chloride as the sole reagent. These nucleophilic substitutions proceed through iminium-activated alcohols as intermediates. The novel method, which can be even performed under solvent-free conditions, is distinguished by an excellent functional group tolerance, scalability (>100 g) and waste-balance (E-factor down to 2). Chiral substrates are converted with excellent levels of stereochemical inversion (99 %→≥95 % ee). In a practical one-pot procedure, the primary formed chlorides can be further transformed into amines, azides, ethers, sulfides, and nitriles. The value of the method was demonstrated in straightforward syntheses of the drugs rac-Clopidogrel and S-Fendiline.
Sulfonimidation via ring-opening of 2-oxazolines with acidic sulfonimide nucleophiles
Gutierrez, David A.,Dean, Dayton R.,Laxamana, Candace M.,Migliozzi-Smith, Madyson,O'Brien, Connor J.,O'Neill, Claire L.,Li, Jie Jack
, p. 261 - 276 (2016/07/06)
Acidic sulfonimide nucleophiles including dibenzenesulfonimide, o-benzenesulfonimide, dimethanesulfonimide, and N-(methylsulfonyl)-benzenesulfonamide are discovered to open a variety of alkyl-, aryl- and heteroaryl-2-oxazoline rings to provide the sulfonimidation products in refluxing 1,4-dioxane. The electron-rich 2-oxazoline substrates worked well for the nucleophilic ring-opening reactions while no reaction took place for the electron-poor 2-oxazoline substrates.