Bicyclic compounds, their use as pharmaceuticals, their preparation, and intermediates useful in their preparation
申请人:SCHERING CORPORATION
公开号:EP0302303A2
公开(公告)日:1989-02-08
Bicyclic compounds are disclosed which are useful as anti-allergic, anti-inflammatory and/or cytoprotective agents and in the treatment of hyperproliferative skin disease. Pharmaceutical compositions and methods of treatment employing such compounds are also disclosed. Many of the compounds are novel; inventive methods for their preparation and for the preparation of intermediates, are also disclosed.
An Efficient Syntesis of 1,8-Naphthyridin-2(1<i>H</i>)-ones: Synthesis of Leukotriene Inhibitor SCH 37224
作者:P. L. Nyce、D. Gala、M. Steinman
DOI:10.1055/s-1991-26519
日期:——
A new, efficient synthesis of 1,8-naphthyridin-2(1H)-ones as applied to the synthesis of the leukotriene release inhibitor, 1,2-dihydro-1-phenyl-3-pyrrolidinio-2-oxo-1, 8-naphthyridin-4-olate inner salt (4) from methyl 2-phenylamino-3-pyridinecarboxylate, (1a), has been described. Towards this synthesis a new reaction procedure for the N-chloroacylation of 1a was developed. The high yield for the rest of the synthesis was obtained by establishing reaction conditions that utilized the solubility, and the stability properties 4.