反应详情

A 0° C. solution of diisopropyl malonate (4.10 mL, 21.58 mmol) in DMF (30 mL) was treated with NaH (60% in mineral oil, 1.036 g, 25.9 mmol), warmed to RT, treated with NaI (0.647 g, 4.32 mmol) followed by the drop-wise addition of a solution of (1-(trifluoromethyl)cyclopropyl)methyl 4-methylbenzenesulfonate (2.54 g, 8.63 mmol) in DMF (30 mL) and heated at 80° C. overnight. The mixture was cooled to RT, quenched with satd. NH4Cl, extracted with hexane (3×) and the combined organics were dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (MTBE/Hex) to afford diisopropyl 2-((1-(trifluoromethyl)cyclopropyl)methyl)malonate (1.53 g, 57.1%). 1H NMR (400 MHz, DMSO-d6): δ 4.91 (m, 2H), 3.47 (t, J=7.2 Hz, 1H), 2.10 (d, J=7.2 Hz, 2H), 1.17 (dd, J=7.3, 6.3 Hz, 12H), 0.89 (m, 2H), 0.76 (m, 2H).

1. temperatureheated at 80° C. overnight
2. temperatureThe mixture was cooled to RT
3. customquenched with satd
4. extractionNH4Cl, extracted with hexane (3×)
5. dry with materialthe combined organics were dried over Na2SO4
6. concentrationconcentrated to dryness
7. custompurified via silica gel chromatography (MTBE/Hex)