A. Krief et L. Provins, STEREOSELECTIVE SYNTHESIS OF METHYL TRANS-CHRYSANTHEMATE AND RELATED DERIVATIVES, Tetrahedron letters, 39(14), 1998, pp. 2017-2020
gamma-hydroxyalkenylstannanes, readily available from alpha,beta-unsat
urated esters, alpha,beta-unsaturated aldehydes and tri(n-butyl)stanny
llithium, react with boron trifluoride etherate to produce vinyl cyclo
propane carboxylic esters. An original highly convergent synthesis of
chrysanthemic acid is reported. (C) 1998 Elsevier Science Ltd. All rig
hts reserved.