Synthesis of the Antiproliferative Agent Hippuristanol and Its Analogues via Suárez Cyclizations and Hg(II)-Catalyzed Spiroketalizations
摘要:
A full account of the synthesis of hippuristanol and its analogues is described. Hecogenin acetate was identified as a suitable and economical starting material for this work, and substrate-controlled stereo-selection was obtained throughout the construction of the key spiroketal unit. Suarez cyclization was first used, but Hg(II)-catalyzed spiroketalization of the 3-alkyne-1,7-diol motif was finally identified as the most convenient strategy.
Synthesis of the Antiproliferative Agent Hippuristanol and Its Analogues via Suárez Cyclizations and Hg(II)-Catalyzed Spiroketalizations
摘要:
A full account of the synthesis of hippuristanol and its analogues is described. Hecogenin acetate was identified as a suitable and economical starting material for this work, and substrate-controlled stereo-selection was obtained throughout the construction of the key spiroketal unit. Suarez cyclization was first used, but Hg(II)-catalyzed spiroketalization of the 3-alkyne-1,7-diol motif was finally identified as the most convenient strategy.