反应详情

By carrying out the reaction as in Example 9 but starting from 500 mg of S-t-butyl 5-Phenyl-5-hydroxy-3-oxopentanethioate (1.78 mmol), 0.49 cm3 of titanium chloride triisopropoxide (1.96 mmol) and from 131.9 mg of sodium cyanoborohydride, there is obtained, after 3 hours 40 minutes, with a yield of 79.5%, 400 mg of S-t-butyl 5-phenyl-3,5-dihydroxypentanethioate for which the syn/anti ratio is equal to 90/10.

1. customthe reaction as in Example 9