A new and practical boronic acid catalyzed intramolecular cyclodehydration of ureas for the synthesis of LFA-1 antagonists
摘要:
A streamlined and practical approach to 1H-imidazo[1.2-alpha]imidazol-2-one LFA-1 antagonist (1) that features as the key step a novel intramolecular boronic acid catalyzed cyclocondensation of a urea and an amide is reported. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of 6,7-Dihydro-5H-imidazo[1,2-a]imidazole-3-sulfonic acid amides
申请人:WANG Xiao-jun
公开号:US20090088571A1
公开(公告)日:2009-04-02
Disclosed is a multi-step process for preparing a compound of Formula I:
wherein R
1
to R
3
are as defined herein. The compounds of formula I inhibit the binding of human intercellular adhesion molecules to the Leukointegrins. As a result, these compounds are useful in the treatment of inflammatory and immune cell-mediated diseases.