| 摘要 |
Compounds of formula I <IMAGE> wherein X1 and X2 are each hydrogen or fluorine; R1 is hydrogen, alkylcarbonyl, alkoxycarbonyl or aminoalkylcarbonyl, and three of R2, R3, R4, R5 and R6 are hydrogen, the others being selected from hydroxy, methyl and methoxy. Also disclosed is a process of preparing compounds of formula I in which R1 and X2 are hydrogen and X1 is fluorine and R2, R3, R4, R5 and R6 are various combinations of hydrogen, methyl, ethyl, tert-butyl, halogen, trifluoromethyl, hydroxy, methoxy and methylene dioxy by reacting a corresponding benzyl magnesium halide with fluoroacetonitrile and reducing the resultant ketimine salt. |
