| 摘要 |
Compounds of formula (I), wherein R1 is one of a number of significances, including cycloalkyl and hydroxycycloalkyl; R2 is hydrogen, (C1-4)alkyl, amino, (C3-5)cycloalkyl or halogen with an atomic number of 9 to 35, and R3 is (C1-4)alkyl, are useful as analgesic agents. Compounds of formula (I) wherein R1 is hydroxy alkyl are new. The compounds of formula (I) may be produced by alkylation in the 2' position in the presence of tetrabutylammonium hydrogen sulfate and a non-polar solvent. |
