Wh. Midura et al., DIASTEREOSELECTIVE ASYMMETRIC CYCLOPROPANATION OF (S)-(-ALPHA-(DIETHOXYPHOSPHORYL)VINYL P-TOLYL SULFOXIDE()), Chemical communications, (10), 1998, pp. 1109-1110
The title sulfoxide 1 reacts with fully deuterated dimethylsulfoxonium
methylide, diphenylsulfonium isopropylide and diphenyldiazomethane to
form the corresponding cyclopropanes 4 as single diastereoisomers; th
e chirality of the cyclopropane (+)-4c obtained from 1 and diphenyldia
zomethane is (S-s,S-c) as determined by X-ray diffraction analysis; ba
sed on experimental data, the steric course of the asymmetric cyclopro
panation is proposed.