2-Chloroethyl chloroformate → 6-[2-(2-Hydroxyethylamino)-4-methoxyphenyl]-5,6,7,8-tetrahydronaphthalen-2-ol

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-(2-amino-4-methoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol (1.6 g) in pyridine (6 ml) was added dropwise 2-chloroethyl chloroformate (1.4 ml) on an ice bath, and the solution was stirred for 6.5 hours. The solution was diluted with ice water, and then extracted with ethyl acetate. The solution was washed with brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. To the residue were added potassium hydroxide (3.0 g) and ethylene glycol (15 ml), and the solution was heated for 3 hours at 180° C. The solution was diluted with ice water, and then extracted with ethyl acetate. The solution was washed with brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide the title compound (800 mg).

Provenance & Evidence