Reaktion #2970

Reaktionsgleichung

(±)-trans-2-ethyl-4a-(3-methoxyphenyl)-6-oxo-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline hydrochloride

ethyl 2-phenylhydrazono-4,4,4-trifluoro-3-oxobutyrate

CH3COONa

→

product

Ausbeute 66.6%

(±)-trans-6-Ethyl-2-ethoxycarbonyl-8a-(3-methoxyphenyl)-4,4a,5,6,7,8,8a,9-octahydro-3-trifluoromethyl-1H-pyrrolo[2,3-g]isoquinoline

Ausbeute 66.6%

Lösungsmittel

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe residue was purified by chromatography on silica gel EtOAc/MeOH 0%→10%)

Vorschrift

3.24 g (10 mmol) of (±)-trans-2-ethyl-4a-(3-methoxyphenyl)-6-oxo-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline hydrochloride, 8.65 g (30 mmol) of ethyl 2-phenylhydrazono-4,4,4-trifluoro-3-oxobutyrate, 2.46 g (30 mmol) of CH3COONa, 7.85 g (120 mmol) of zinc dust and 15 ml of glacial acetic acid were treated as described in example 1. The residue was purified by chromatography on silica gel EtOAc/MeOH 0%→10%) yielding 3.0 g of product which was triturated in Et2O yielding 2.5 g of the title compound. M.p. 209°-211° C.

Quelle