1: With (DHQD)2PHAL; methanesulfonamide; α-AD mix {K4[Fe(CN)6], OsO4, Na2CO3, (DHQ)2-PHAL} in water; tert-butyl alcohol T=0°C; Oxidation; Sharpless asymmetric dihydroxylation; 2: With water; sodium sulfite in tert-butyl alcohol T=0 - 20°C; Reduction; 0.75 h; Title compound not separated from byproducts;