2-Chloro-1,1-dimethoxyethane → 1-(3,3-dimethoxy-1-phenylpropyl)-1H-pyrazole

関与物質

反応手順

To a solution of 1-benzyl-1H-pyrazole (0.653 g) in tetrahydrofuran (5 mL) cooled to −78° C. was dropwise added 1.6M n-butyllithium (2.84 mL). The reaction mixture was stirred for 60 minutes, and 2-chloro-1,1-dimethoxyethane (0.517 mL) was added, and stirring continued for 3 hours. The reaction mixture was allowed to slowly warm up to room temperature, and was quenched with water, extracted with ether, dried over Na2SO4, filtered, and concentrated. The product was purified by chromatography on silica gel using 0-20% ethyl acetate/hexanes as the eluent to provide the title compound.

情報源と証拠