Stereoselective synthesis of C-6 hydroxy tricyclic sulfone as a γ-secretase inhibitor

The synthesis of a C-6 hydroxy tricyclic sulfone was described with two key reactions: the Suzuki coupling and the regioselective and stereoselective cis ring opening of the epoxide. Overall, the 14-step synthesis was achieved in 2.1% yield. (C) 2011 Elsevier Ltd. All rights reserved.