(+/-)-trans-2-Ethyl-4a-(3-methoxyphenyl)-6-oxo-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline hydrochloride → (+/-)-trans-6-Ethyl-2-ethoxycarbonyl-3-methyl-8a-(3-methoxyphenyl)-4,4a,5,6,7,8,8a,9-octahydro-1H-pyrrolo[2,3-g]isoquinoline

Beteiligte Stoffe

Reaktionsschritte

0.8 g (2.47 mmol) of (±)-trans-2-ethyl-4a-(3-methoxyphenyl)-6-oxo-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline hydrochloride and 0.87 g (93.7 mmol) of ethyl 2-phenylhydrazono-3-oxobutyrate [Organic Reactions, R. Adams Ed; Wiley, New York, 10, 32-33, (1951-1959)] were dissolved in a mixture of 3 mi of glacial acetic acid and 0.34 g (4.2 mmol) of CH3COONa. The solution was treated as described in example 1 adding 0.74 g (11.3 mmol) of zinc dust. The residue was purified by flash chromatography (AcOEt/MeOH/conc. NH4OH 94:5:0.5; Rf=0.3), obtaining 0.6 g of the title compound.

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