A new total synthesis of racemic 3-hydroxyisomorphinans (3), 3-hydroxyhasubanans (9), 3,9α-dihydroxyhasubanans (5), and 3,9β-dihydroxyhasubanans (7), via 4a-(2-aminoethyl)-1,2,3,4,4a,9-hexahydro-6-methoxyphenanthrene (1a) is described.
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Monković et al. (1976) studied this question.
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