Mechanochemical Preparation of Hydantoins from Amino Esters: Application to the Synthesis of the Antiepileptic Drug Phenytoin
作者:Laure Konnert、Benjamin Reneaud、Renata Marcia de Figueiredo、Jean-Marc Campagne、Frédéric Lamaty、Jean Martinez、Evelina Colacino
DOI:10.1021/jo5017629
日期:2014.11.7
eco-friendly preparation of 5- and 5,5-disubstituted hydantoins from various amino ester hydrochlorides and potassium cyanate in a planetary ball-mill is described. The one-pot/two-step protocol consisted in the formation of ureido ester intermediates, followed by a base-catalyzed cyclization to hydantoins. This easy-handling mechanochemical methodology was applied to a large variety of α- and β-amino esters
Novel inhibitors of bone reabsorption and antagonists of vitronectin receptors
申请人:——
公开号:US20010021708A1
公开(公告)日:2001-09-13
The present invention relates to 5-membered ring heterocycles of the formula I,
1
in which E, F, G, W, Y and Z have the meaning given in the patent claims, to their preparation and to their use as medicaments.
The novel compounds are used as vitronectin receptor antagonists and as inhibitors of bone reabsorption.