4-[(bicycle heterocyclyl)-methyl and -hetero]-piperidines
申请人:Janssen Pharmaceutica, N.V.
公开号:US04695575A1
公开(公告)日:1987-09-22
4-[(Bicyclic heterocyclyl)methyl and -hetero]-piperidines having antihistaminic and serotonin-antagonistic properties which compounds are useful agents in the treatment of allergic diseases.
A convenient oxidative cyclodesulfurization method toward the synthesis of benzofused nitrogen heterocycles using inexpensive and readily available potassium periodate as an oxidant was developed. Upon treating isothiocyanates with ortho-substituted anilines bearing N,N-, N,O-, and N,S-bis-nucleophiles, followed by an intramolecular cyclization of the in situ generated monothioureas, substituted 2-aminobenzazole
Given the necessity of sacrificial reductants in various biomimetic aerobic oxygenations, alloxan-catalyzed aerobic redox system for one-pot atom-economic synthesis of sulfinyl-functionalized benzimidazoles was developed by ingeniously binding both the substrate sulfide and sacrificial reductant. This mild and transition-metal-free protocol undergoes two oxidations without additional sacrificial reagents
Chemoselective aerobic oxidation of 2-amino-N-benzylanilines into N-(2-aminophenyl)imines via a nitroxide-free copper catalysis
作者:Yadong Zhai、Jing Rong、Zhicheng Zhang、Xiang Cao、Zhenni Su、Qingfa Zhou、Chuanzhou Tao
DOI:10.1016/j.tetlet.2019.03.039
日期:2019.4
Chemoselectiveoxidative synthesis of N-(2-aminophenyl)imines from 2-amino-N-benzylanilines was accomplished through combined use of O2(air) and copper salt. This transformation was performed at room temperature, and the mild oxidation was efficient and chemoselective without using nitroxyl radicals and ligands.
4-((Bicyclic heterocyclyl)-methyl and -hetero)-piperidines
申请人:Janssen Pharmaceutica, N.V.
公开号:US04839374A1
公开(公告)日:1989-06-13
4-[Bicyclic heterocyclyl)methyl and -hetero]-piperidines having antihistaminic and serotonin-antagonistic properties which compounds are useful agents in the treatment of allergic diseases.