HIGH-Yield PREPARATION METHOD FOR AN INNOVATIVE VASCULAR LEAK INHIBITOR

Abstract

The present invention relates to a method for preparing a novel vascular leakage inhibitor with high yield. The preparation method is easy to react and more productive and economical than the conventional method, using an intermediate agent that can easily remove impurities generated during the reaction. In addition, the preparation method can produce a novel vascular leakage inhibitor with high yield, using a new reagent that has not been used in the isomerization step in the past, and is particularly advantageous in the production of a high-quality active pharmaceutical ingredient.