PROCESS FOR PREPARING CRYSTALLINE FORM I OF CABERGOLINE

摘要

A process for producing crystalline form I of cabergoline, which comprises crystallization of the desired form from a toluene/heptane or toluene/hexane mixture starting from raw cabergoline, followed by recovery and removal of the solvent from the resulting toluene solvate Form X. The new solvate Form X of cabergoline, useful intermediate, and its preparation are also provided.