Novel N-(substituted aryl)-N'-(substituted alkoxy)-ureas and thioureas as antihypercholesterolemic and antiatherosclerotic agents
申请人:WARNER-LAMBERT COMPANY
公开号:EP0386487A1
公开(公告)日:1990-09-12
Novel N-[substituted aryl]-N′-(substituted alkoxy)-urea and thiourea derivatives are described, as well as methods for the preparation and pharmaceutical composition of same, which are useful in preventing the intestinal absorption of cholesterol and thus are useful in the treatment of hypercholesterolemia and atherosclerosis.
Mild and Efficient Lewis Acid-Promoted Detritylation in the Synthesis of <i>N</i>-Hydroxy Amides: A Concise Synthesis of (−)-Cobactin T
作者:Shyh-Ming Yang、Bharat Lagu、Lawrence J. Wilson
DOI:10.1021/jo701411d
日期:2007.10.1
Lewis acid promoted deprotection of O-trityl hydroxylaminederivatives is described. A range of acid-labile protecting groups, such as N-Boc and O-TBS, were tolerated under these mild conditions. The present method is applicable to the synthesis of a broad range of hydroxylaminederivatives, including N-hydroxy amides (hydroxamic acids), N-hydroxy sulfonamides, and N-hydroxy ureas, which often exhibit