摘要:
During the course of drug metabolism studies, a major metabolite of compound 1 was detected in rhesus monkeys and assigned structure 4. The intriguing biotransformation of 1 leading to 4 was confirmed by a 19-step total synthesis starting from resorcinol (11). the key feature of which was the construction of the oxygen bridge utilizing a phenolic oxidation and trapping sequence. In addition.. the synthesis of a related metabolite (5) is described.