3-Bromoanisole → methyl (3aRS,4SR,7RS,7aRS)-2-benzyl-7-hydroxy-7-(3-methoxyphenyl)-4-phenyloctahydroisoindole-3a-carboxylate

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Reaction Steps

By carrying out the reaction as in Stage A of Example 6, but from 1.56 cm3 (12.4 mmol) of 3-bromoanisole and from 302 mg (12.4 mmol) of magnesium turnings at reflux for one hour in 5 cm3 of dry diethyl ether, followed successively by 1.02 g (4.13 mmol) of anhydrous cerium chloride and by a solution of 1.5 g (4.13 mmol) of methyl(3aRS,4SR,7aRS)-2-benzyl-7-oxo-4-phenyloctahydroisoindole-3a-carboxylate, obtained in Stage B of Example 1, in 8 cm3 of diethyl ether, 945 mg (48%) of methyl(3aRS,4SR,7RS,7aRS)-2-benzyl-7-hydroxy-7-(3-methoxyphenyl)-4-phenyloctahydroisoindole-3a-carboxylate were obtained, after purification by flash chromatography on silica gel (230-400 mesh), elution being carried out with cyclohexane and then with a cyclohexane/ethyl acetate (80/20 by volume) mixture, in the form of a white solid, the characteristic of which was as follows:

Provenance & Evidence