Wai-Cheung Lo, Chi-Ming Che, Kin-Fai Cheng and Thomas C. W. Mak
Ruthenium porphyrin and porphycene complexes catalyse stereospecific cyclopropanation of styrenes; high product turnovers with up to 90.8% ee were achieved with the [Ru(P*)(CO)(EtOH)] catalyst (H2P* = chiral D4 porphyrin).