Reaktion #2971

Reaktionsgleichung

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

N, N-dimethyl-2-phenylhydrazono-3-oxobutyramide

CH3COONa

→

product

Ausbeute 84.8%

3-methyl-4,4a,5,6,7,8,8a,9-octahydro-1H-pyrrolo[2,3-g]isoquinoline

Ausbeute 84.8%

Lösungsmittel

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe residue was purified by chromatography on silica gel (EtOAc/MeOH 0%→30%)

Vorschrift

1.0 g (3.1 mmol) of (±)-trans-2-ethyl-4a-(3-methoxyphenyl)-6-oxo-1,2,3,4,4a,5,6,7,8,8a-decahydroisoquinoline hydrochloride, 2.33 g (10 mmol) of N, N-dimethyl-2-phenylhydrazono-3-oxobutyramide, 0.82 g (1 0 mmol) of CH3COONa, 2.6 g (40 mmol) of zinc dust and 5 ml of glacial acetic acid were treated as described in example 1. The residue was purified by chromatography on silica gel (EtOAc/MeOH 0%→30%) yielding 0.5 g of product which was crystallized from Et2O yielding 0.5 g of the title compound. M.p.=151°-153° C.

Quelle