| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| 5,7-二羟基-2,2-二甲基-2,3-二氢-4H-苯并吡喃-4-酮 | 5,7-dihydroxy-2,2-dimethylchroman-4-one | 883-09-0 | C11H12O4 | 208.214 | 
| —— | 7-benzyloxy-2,2-dimethyl-5-hydroxy-4-chromanone | 50386-14-6 | C18H18O4 | 298.339 | 
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| 5-甲氧基-2,2-二甲基色满-4-酮 | 2,3-dihydro-5-methoxy-2,2-dimethyl-4H-1-benzopyran-4-one | 98910-61-3 | C12H14O3 | 206.241 | 
| —— | Dimethyl-thiocarbamic acid O-(5-methoxy-2,2-dimethyl-4-oxo-chroman-7-yl) ester | 159151-03-8 | C15H19NO4S | 309.386 | 
| —— | 7-Mercapto-5-methoxy-2,2-dimethyl-chroman-4-one | 159151-28-7 | C12H14O3S | 238.307 | 
| —— | 2,2-dimethyl-7-hydroxy-5-methoxychroman | 50386-17-9 | C12H16O3 | 208.257 | 
| —— | Dimethyl-thiocarbamic acid S-(5-methoxy-2,2-dimethyl-4-oxo-chroman-7-yl) ester | 159151-05-0 | C15H19NO4S | 309.386 | 
| —— | 7-(2'-propynyloxy)-5-methoxy-2,2-dimethyl-3,4-dihydrobenzo[1,2-b]pyran | 196870-75-4 | C15H18O3 | 246.306 | 
| —— | 6,7-dihydro-8,8-dimethyl-5-methoxy-2H,8H-benzo[1,2-b:5,4-b']pyran | 192936-34-8 | C15H18O3 | 246.306 | 
| —— | 7,8-dihydro-6,6-dimethyl-9-methoxy-2H,6H-benzo[1,2-b:3,4-b']pyran | 192936-33-7 | C15H18O3 | 246.306 | 
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.