Switching of stereochemistry. dramatic effect of HMPA on the stereoselectivity of the cyclopropanation reaction of telluronium allylides with alpha,beta-unsaturated esters and amides
S. Ye et al., Switching of stereochemistry. dramatic effect of HMPA on the stereoselectivity of the cyclopropanation reaction of telluronium allylides with alpha,beta-unsaturated esters and amides, J ORG CHEM, 65(19), 2000, pp. 6257-6260