PROCESS FOR PREPARING REGIOSPECIFIC SUBSTITUTED PYRAZINE ISOMERS

摘要

The present invention relates to a process of producing specific isomers of substituted pyrazine compounds, substituted thieno[b]pyrazine, substituted pteridins, compounds, and derivatives thereof. The regiospecific substituted pyrazine compounds are useful in the preparation of pharmaceuticals, includi ng compounds useful in treating benign prostatic hyperplasia.