反应详情

A mixture of 0.6 g (2.6 mmol) 2-[1,3]dioxolan-2-yl-3-methoxy-6-nitro-pyridine, 0.55 g (2.9 mmol) of chloromethylphenylsulfone and 2.9 ml (2.9 mmol) of potassium t-butoxode (1M solution in THF) in 5 ml of DMF were combined at 5° C. and stirred at ambient temperature for 18 hours. The reaction mixture was quenched with 25 ml of water and extracted with ethyl acetate. The ethyl acetate extracts were combined, dried (Na2SO4), and evaporated. The residue was chromatographed on silica using 5:1 chloroform/ethyl acetate as the elutant. Appropriate fractions were combined and evaporated to yield 0.28 g of 3-benzenesulfonylmethyl-6-[1,3]dioxolan-2-yl-5-methoxy-2-nitro-pyridine as an oil. TLC: Rf=0.4 (1:1 chloroform/ethyl acetate). 1H NMR (CDCl3) δ 7.7 (m, 3H), 7.55 (m, 2H), 7.42 (s, 1H), 6.30 (s, 1H), 4.90 (s, 2H), 4.30 (m, 2H), 4.10 (m, 2H), 4.02 (s, 3H).). Mass Spectrum: m/e=381.0 (p+1).

1. customwere combined at 5° C.
2. customThe reaction mixture was quenched with 25 ml of water
3. extractionextracted with ethyl acetate
4. dry with materialdried (Na2SO4)
5. customevaporated
6. customThe residue was chromatographed on silica using 5:1 chloroform/ethyl acetate as the elutant
7. customevaporated