Intermolecular SNAr of the heterocycle-activated nitro and fluoro groups-application in the synthesis of polyazamacrocyclic ligands
申请人:Chan K. Michael
公开号:US20050239767A1
公开(公告)日:2005-10-27
A new class of tetracylic benzimidazole compounds and derivatives thereof. Additionally provided is a synthetic route for the generation of these and related compounds via Intramolecular Aromatic Nucleophilic Substitution (S
N
Ar) of the Benzimidazole-Activated Nitro Groups. Additionally, a facile route for the generation of novel phenol species as thermal decomposition of compounds the S
N
Ar product, which occurs at high temperature resulting in cleavage of the ether linkage and formation of a vinyl group and phenol is provided. Also provided are methods of using the compounds described herein in the treatment HIV.
Intramolecular Aromatic Nucleophilic Substitution of the Benzimidazole-Activated Nitro Group
作者:Tomasz Fekner、Judith Gallucci、Michael K. Chan
DOI:10.1021/ol035761w
日期:2003.12.1
A wide range of 2-(2-nitrophenyl)-1H-benzimidazoles undergo high-yielding intramolecular S(N)Ar of nitrite with N-pendant alkoxides under mild conditions (DMF, rt). When this operationally simple process is carried out at elevated temperatures in the presence of excess NaH, the initially formed S(N)Ar products are converted to the corresponding N-vinyl-substituted 2-(2-hydroxyphenyl)-1H-benzimidazoles