PROCESS FOR THE PREPARATION OF SUBSTITUTED QUINOXALINES
申请人:Narasimha Rao Mahendranath Rao
公开号:US20120277433A1
公开(公告)日:2012-11-01
The present invention is directed to an improved process for the preparation of substituted quinoxalines by cyclization of the corresponding dianiline in the presence of ion exchange resin.
The present invention relates to a new process for the preparation of substituted quinoxalines (I) by cyclization of the corresponding dianiline with 2,3 dihydroxy-1,4-dioxane.
In a preferred embodiment, the invention provides a process for the preparation of compounds having the formula
wherein Q is a nitrogen protecting group. Compounds of formula III and their derivatives are precursors to certain aryl fused azapolycyclic compounds which exhibit activity as agents for the treatment of neurological and psychological disorders.