中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5,7-二羟基-2-甲基-3-苯基色烯-4-酮 | 5,7-dihydroxy-2-methylisoflavone | 844-95-1 | C16H12O4 | 268.269 |
—— | Dimethyl-thiocarbamic acid O-(5-hydroxy-2-methyl-4-oxo-3-phenyl-4H-chromen-7-yl) ester | 142751-48-2 | C19H17NO4S | 355.414 |
—— | Dimethyl-thiocarbamic acid S-(5-hydroxy-2-methyl-4-oxo-3-phenyl-4H-chromen-7-yl) ester | 142751-53-9 | C19H17NO4S | 355.414 |
An efficient procedure to deoxygenate hydroxy substituted flavonoids, isoflavonoids and related compounds via their trifluoromethanesulfonates is presented. Their reduction with formic acid in the presence of a catalytic amount of palladium acetate, triethylamine and 1,3-bis(diphenylphosphanyl) propane (dppp) in DMF results in their des-hydroxy derivatives without affecting other functional groups.