Structure-activity relationship studies of thalidomide analogs with a taxol-like mode of action.

Abstract Anti-microtubule agents such as paclitaxel and docetaxel have played an important role in the treatment of cancer for many years. Recently, a small molecule that has a taxol-like mode of action ( 5HPP - 33 ) was reported. Herein, the detailed structure–activity relationship (SAR) studies of 5HPP - 33 analogs that are substituted at the isoindole and phenyl rings are described. Bulky substitutions (such as di-isopropyl groups) on the phenyl ring result in the isoindole and phenyl rings being perpendicular to each other. It was found that this conformation is critical for anti-microtubule activity. These studies have provided valuable information, which will be helpful in the design of more potent analogs.