Stereoselective construction of quaternary chiral centers using Ti(III)-mediated opening of 2,3-epoxy alcohols: studies directed toward the synthesis of penifulvins
作者:Tushar Kanti Chakraborty、Amit Kumar Chattopadhyay、Rajarshi Samanta、Ravi Sankar Ampapathi
DOI:10.1016/j.tetlet.2010.06.076
日期:2010.8
A trisubstituted α,β-unsaturated ester moiety was suitably placed in a molecule also bearing an epoxy alcohol moiety at its other end to intramolecularly trap the intermediate radical, which was formed when the molecule was treated with Cp2Ti(III)Cl to regio- and stereoselectively open its epoxy ring, giving rise to a quaternary chiral center. The method was subsequently used in an attempt to construct