Diels-Alder reaction of 6-demethoxy-&β-dihydrothebaine with methyl vinyl ketone using microwave heating; preparation and pharmacology of 3-hydroxy-&α,&α,17-trimethyl-6&β,14&β-ethenomorphinan-7&β-methanol, a novel deoxygenated diprenorphine analogue (chemi

Article abstract of DOI:10.1002/recl.19881070610

Diels-Alder reaction of 6-demethoxy-β-dihydrothebaine 6 with methyl vinyl ketone (3-buten-2-one) yielded, in a 3:2 ratio, (+)-7β-acetyl-3-methoxy-17-methyl-6β,14β-ethenomorphinan-4-ol (7) and the novel (+)-8β-acetyl-3-methoxy-17-methyl-6β,14β-ethenomorphi