Acceleration of Acid-Catalyzed Hydrolysis in a Biphasic System by Sodium Tetracyanocyclopentadienides

The hydrolysis of tert-butyldimethylsilyl L-menthyl ether (3) in a CH2Cl2-1 M HCl biphasic solvent system was accelerated by the addition of sodium tetracyanocyclopentadienides 1. Particularly, the reaction rate was enhanced using sodium salt 1a-c with a lipophilic substituent on the cyclopentadienide ring. From the results obtained by a triphasic experiment, hydrolysis proceeds via the formation of hydronium ion 2 in the aqueous phase by ion exchange, followed by the transfer of 2 to the CH2Cl2 phase.

CF3-Substituted semisquarate: a pluripotent building block for the divergent synthesis of trifluoromethylated functional molecules

The first synthesis of a CF₃-substituted semisquarate was accomplished via nucleophilic trifluoromethylation using CF₃SiMe₃ and subsequent rhenium-catalyzed allylic alcohol rearrangement.