Triethylamine → Ethyl 2-(((methylsulfonyl)oxy)methyl)cyclopropanecarboxylate

Participants

Reaction Steps

To a reaction solution of ethyl 2-(hydroxymethyl)cyclopropanecarboxylate (4-1) (577 mg; 4.0 mmol) with Et3N (1.1 mL; 8.0 mmol) and DMAP (49 mg; 0.4 mmol) in 12 mL of CH2Cl2 at 0° C. was added methanesulfonyl chloride (0.4 mL; 4.8 mmol). The resulting mixture of brown color suspension was stirred at 0° C. to room temperature under N2 for overnight. The reaction mixture was quenched with NaHCO3, then partitioned between CH2Cl2 (200 mL) and saturated NaHCO3 solution (50 mL); brine (50 mL). The organic layer was dried (Na2SO4), then filtered through silica gel pad, eluted with hexane:EtOAc/1:1. The filtrate was concentrated by vacuum to give 880 mg of ethyl 2-{[(methylsulfonyl)oxy]methyl}cyclopropanecarboxylate as a yellow oil (99% yield). 1H NMR (400 MHz, chloroform-D) δ ppm 0.91-1.02 (m, 1H) 1.26 (q, J=6.99 Hz, 3H) 1.29-1.36 (m, 1H) 1.63-1.74 (m, 1H) 1.79-1.92 (m, 1H) 3.02 (s, 3H) 3.99-4.24 (m, 4H).

Provenance & Evidence