Tributylphosphine → (4-{(e)-3-[4-(3-Dimethylamino-prop-1-ynyl)-phenyl]-3-phenyl-allyloxy}-2-methyl-phenoxy)-acetic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of the above alcohol (407 mg, 1.397 mmol) in dry tetrahydrofuran (40 mL) was added tributylphosphine (0.50 ml, 2.79 mmol). To the mixture was cooled to 0° C. and added 1,1′-(azodicarbonyl)dipiperidine (703 mg, 2.79 mmol) and after 10 min. (4-hydroxy-2-methyl-phenoxy)-acetic acid methyl ester (301 mg, 1.536 mmol) was added. After stirring for 1.5 hr at 0° C. the mixture was allowed to warm up to ambient temperature and stirred overnight. The reaction mixture was added silica gel Fluka 60 (10 g) and evaporated in vacuo. The residue was purified by ISCO combiflash 16 (silica gel, hexane/ethyl acetate 85:15) giving (4-{(E)-3-[4-(3-dimethylamino-prop-1-ynyl)-phenyl]-3-phenyl-allyloxy}-2-methylphenoxy)-acetic acid methyl ester as an oil.

Provenance & Evidence