Construction of Asymmetric Quaternary Carbon Center Containing Heteroatom via Regioselective Cleavage of Cyclopropane Ring Mediated by Mercury(II) Salt.
Construction of Asymmetric Quaternary Carbon Center Containing Heteroatom via Regioselective Cleavage of Cyclopropane Ring Mediated by Mercury(II) Salt.
Construction of Asymmetric Quaternary Carbon Center Containing Heteroatom via Regioselective Cleavage of Cyclopropane Ring Mediated by Mercury(II) Salt.
(6S, 7S)-1-Oxa-7-bromomethylspiro[5.5]undecanes (12 and 13) were synthesized from the optically active alkenyl sulfoxide (7). The key step involves a tandem regioselective cleavage of cyclopropane ring and stereoselective nucleophilic cyclization of the cyclopropylcarboxylic acid (11).