反应详情

A mixture of 3.0 g (13 mmol) 5-Bromo-6-chloro-nicotinic acid, 1.4 g (19 mmol) (hydroxymethyl)cyclopropane and 2.85 g (51 mmol) potassium hydroxide in DMSO (12 mL) was heated under microwave radiation for 6 min to 100° C. 50 mL water and 150 mL citric acid (10%) was added. A solid precipitated, was filtered off, re-dissolved in ethyl acetate and dried with Na2SO4. The product crystallized upon evaporation of the solvent from ethyl acetate/heptane 1:1 to yield 2.1 g (71%) of the title compound as white solid, MS (ISP): 270.3 (M−H).

1. temperaturewas heated under microwave radiation for 6 min to 100° C
2. customA solid precipitated
3. filtrationwas filtered off
4. dissolutionre-dissolved in ethyl acetate
5. dry with materialdried with Na2SO4
6. customThe product crystallized upon evaporation of the solvent from ethyl acetate/heptane 1:1