AN IMPROVED PROCESS FOR THE PREPARATION OF ELVITEGRAVIR

摘要

The present invention relates to improved process for the preparation of elvitegravir (12), wherein the compound of formula (6) is protected with suitable protecting agents and further reacted with formula (9) in the presence of tetrakis(triphenylphosphine)-palladium (0) catalyst in tetrahydofuran to get corresponding condensed products, which are subjected to hydrolysis, de-protection to get compound of formula (11). The compound of formula (11) is optionally treated with amine to get amine addition salt of formula (11D), then setting free of amine salt in the presence of acid to get pure compound of formula (11). The pure compound of formula (11) is reacted with sodium alkoxide to get pure elvitegravir (12).