1: With sodium hydroxide; (-)-(R,R)-TADDOL in toluene T=15 - 20°C; Alkylation; benzylation; 12 h; 2: With hydrogenchloride in water; toluene Hydrolysis; Heating; Title compound not separated from byproducts;

1: With sodium hydroxide; (-)-(R,R)-TADDOL in toluene T=15 - 20°C; Alkylation; benzylation; 12 h; 2: With hydrogenchloride in water; toluene Hydrolysis; Heating; Title compound not separated from byproducts;