Mizoroki–Heck coupling reactions of arenediazonium tetrafluoroborate salts catalyzed by aluminium hydroxide-supported palladium nanoparticles
摘要:
Mizoroki-Heck cross-couplings of arenediazonium tetrafluoroborate salts catalyzed by highly active aluminium hydroxide-supported palladium nanoparticles catalyst have been investigated for the first time. The reactions are performed at 25 degrees C in EtOH without any base and ligand to afford the corresponding coupling products in good to excellent yields under non-anhydrous and non-degassed conditions. (C) 2013 Elsevier B.V. All rights reserved.
One-pot stereoselective synthesis of α,β-differentiated diamino esters via the sequence of aminochlorination, aziridination and intermolecular S<sub>N</sub>2 reaction
作者:Yiwen Xiong、Ping Qian、Chenhui Cao、Haibo Mei、Jianlin Han、Guigen Li、Yi Pan
DOI:10.3762/bjoc.10.189
日期:——
We report here an efficient one-pot method for the synthesis of alpha,beta-differentiated diamino esters directly from cinnamate esters using N,N-dichloro-p-toluenesulfonamide and benzylamine as nitrogen sources. The key transformations include a Cu-catalyzed aminohalogenation and aziridination, followed by an intermolecular SN2 nucleophilic ring opening by benzylamine. The reactions feature a wide