Chiral OH o2N、+H Zinc Catalyst ON 5 mol% THF,-35°c ee=92% 95% Chiral Lanthanum Catalyst OH Ph Ph 10 mol% THF OH OH 24h,50°c92% =95% Yoshikawa.N etal. J. Am. Chem. Soc. 2001Ph O OH + H O Ph O OH OH Chiral Lanthanum Catalyst 10 mol% THF 24h,-50 oC 92% ee=95% O2N H O2N O Chiral OH Zinc Catalyst 5 mol% THF, -35 oC 95% + ee=92% Yoshikawa,N etal. J. Am. Chem. Soc. 2001