tert-Butyl hydroperoxide → N-Cyclopropyl-3-propyloxirane-2-carboxamide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A flask equipped with an overhead stirrer, thermometer and addition funnel was placed under a nitrogen atmosphere then charged with tert-butyl hydrogen peroxide (TBHP; 95 mL, 5.5 M, 522 mmol) and tetrahydrofuran (THF; 200 mL). The reaction was cooled to −20±5° C. and n-butyl lithium (n-BuLi; 235 mL, 2.5 M, 587 mmol) was charged to the addition funnel and slowly added, keeping the reaction temperature below −5±5° C. Upon completion of addition the reaction was warmed to 0±5° C. and the amide of Example 4 (19.80 g, 130 mmol) in THF (20 mL) was added maintaining the temperature at 0±5° C. after which the temperature was increased to 25±5° C. and the reaction stirred for 12 hours. After this time IPAc (200 mL) and saturated aqueous sodium hydrosulfite (200 mL) were added and the reaction stirred for 60 min. The layers were separated and the aqueous layer extracted with IPAc (twice, 75 mL each). The combined organic phases were dried over sodium sulfate (Na2SO4), filtered and concentrated under reduced pressure to provide the title compound (21.87 g, 99%).

Herkunft & Nachweise