Fn. Palmer et Dk. Taylor, The first practical approach to optically pure cyclopropanes derived from trans gamma-hydroxy enones, J CHEM S P1, 9, 2000, pp. 1323-1325
A new approach for the synthesis of optically pure cyclopropanes from trans
gamma-hydroxy enones and stabilised phosphorus ylides is presented; the us
e of light and a triplet sensitiser leads to a dramatic increase in reactio
n rate and isolated yield.