Syntheses of cyclic diselenides through diselenolates and the following deselenation reactions by means of three ways were studied. The preparation of the cyclic diselenides in the presence of excess sodium borohydride gave thirty-eight diselenides containing diselena[3.3]cyclophanes and alicyclic diseleno compounds in high yields in addition to two triple-bridged selenacyclophanes. Photodeselenation
Arylmethylphosphonates and phosphonic acids useful as anti-inflammatory
申请人:The Upjohn Company
公开号:US05593980A1
公开(公告)日:1997-01-14
This invention provides a new use of acids, esters, and salts of arylmethylphosphonates of Formula I, ##STR1## or a phosphonic acid of Formula II ##STR2## and derivatives as anti-inflammatory and anti-arthritic agents. Representative compounds include 4-dodecyloxybenzylphosphonic acid dimethyl ester, (2-naphthalenylmethyl)phosphonic acid dimethyl ester, and ([1,1'-biphenyl]-2-ylmethyl)phosphonic acid dimethyl ester.
Novel anion-exchange extractants were synthesized, which are lipophilic phosphonium ions bearing three cationic centers in a molecule. By using the tri-cationic extractants, the selectivity toward the extraction of triply charged anions such as hexacyanoferrate(III) was much increased.