Stereoselective synthesis of β-naltrexol, β-naloxol β-naloxamine, β-naltrexamine and related compounds by the application of the mitsunobu reac
摘要:
As a continuation of our work, aimed at adopting the Mitsunobu reaction in the morphine series, a few representatives of dihydroisocodeines and dihydroisomorphines and their 14 beta-hydroxy analogues were prepared. p-Nitrobenzoic acid was used as carboxylic acid and the prepared esters were cleaved to obtain the title compounds. Using phthalimide as acidic component several new 6 beta-phthalimidodihydromorphine and dihydrocodeine derivatives and their 14 beta-hydroxy analogues have been synthesized. Cleavage of the phthalimido derivatives with hydrazine hydrate afforded the corresponding 6 beta-amino derivatives.