Synthesis of N-Substituted 7β-Diprenorphine Derivatives
摘要:
The separation of thevinone (2a) and beta-thevinone (2b), as well as that of dihydrothevinone (3a) and beta-dihydrothevinone (3b) was accomplished. By the application of various procedures numerous new N-substituted Diprenorphine analogues (8a-f) with 7R absolute configuration were synthesized. Detailed pharmacological investigation of the prepared compounds may contribute to a better understanding of the structure-activity relationship of morphine alkaloids.
Dihydronorthevinone (2b) was prepared from dihydrothevinone (2a) with diethyl azodicarboxylate (DEAD) and transformed into a number of new N-substituted dihydronorthevinone derivatives (2c-2g). Grignard reactions of the new compounds with methylmagnesium iodide and tert-butyl-magnesium chloride were studied. O-Demethylation of 3a-3j resulted in the corresponding N-substituted buprenorphine and diprenorphine analogs 4a-4j.