Benzoyl chloride, 2-chloro-4-nitro- → tert-Butyl 2-chloro-4-nitrobenzoate

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Reaction Steps

Lithium tert-butylate (2.2 M in tetrahydrofuran, 6.2 mL, 13.6 mmol) was added to a solution of 2-chloro-4-nitrobenzoyl chloride (2.00 g, 9.09 mmol) in tetrahydrofuran (12 mL) at 0° C. The orange solution was kept at 0° C. for 1.5 h, then allowed to reach room temperature over 16 h, then partitioned between 1 M aq. sodium carbonate solution and isopropyl acetate. The organic layer was dried (MgSO4) and evaporated to afford tert-butyl 2-chloro-4-nitro-benzoate (2.05 g, 88%) which was directly used in the next step. Brown oil, MS (EI)=257.1 (M+).

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