Carbon Dioxide → 2-(tert-Butoxycarbonyl)-6-chloro-4-trifluoromethylbenzoic acid

関与物質

反応条件

反応手順

To a cold (-100° C.) stirred solution of N-(tert-butoxycarbonyl)-3-chloro-5-trifluoromethylaniline 93.4 g, 11.5 mM) in dry tetrahydrofuran (30 mL) under a nitrogen atmosphere was added dropwise t-butyllithium (14.2 mL of 1.7 M solution, 24.2 mM) in pentane. The temperature of the reaction mixture was maintained at -103° to -98° C. during the addition and for 3.25 hr after the addition was completed. Crushed Dry Ice was then added to the cold reaction mixture which, after being allowed to warm to -75° C., was poured into water. The resulting mixture was extracted with ethyl acetate and the combined extracts were dried (MgSO4), filtered and concentrated to leave (3.2 g, 82%) the title compound as a solid white foam.

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