反应详情

By carrying out the reaction as in Example 9 but starting from 1.0 g of t-butyl 7-phenyl-5-hydroxy-3-oxo-6-heptenoate (3.42 mmol) and using 0.95 cm3 of titanium chloride triisopropoxide (3.77 mmol) and 261.8 mg of sodium cyanoborohydride (3.95 mmol), there is obtained, after reacting for 3 hours 10 minutes, with a yield of 55%, 550 mg of t-butyl 7-phenyl-3,5-dihydroxy-6-heptenoate for which the syn/anti ratio is equal to 90/10.

1. customthe reaction as in Example 9
2. customthere is obtained