反应详情

温度

60 °C

Combine (S)-1,4-dibenzyl-2-vinyl-piperazine (4.9 g, 16.63 mmol) and 9-borabicyclo[3.3.1]nonane (199.6 ml, 99.78 mmol, 0.5 M in THF) and stir at ambient temperature. After 24 hours, add iodo-benzene (5.1 g, 24.95 mmol), triphenylphosphine (697.9 mg, 2.66 mmol), tetrakis(triphenylphosphine) palladium(0)(384.3 mg, 0.33 mmol), and 3N NaOH (13.7 mL) and stir at 60° C. After 22 hours, dilute the mixture with ethyl acetate and wash it with 1N sulfuric acid. Adjust the pH to 14, extract with ethyl acetate, and combine, wash (brine), dry (sodium sulfate), and reduce the extracts to residue. Purify the residue on silica gel using a ethyl acetate/hexanes gradient (5:95 to 10:90) to give (5.15 g, 84%) of the title compound as a white solid: mp 86–90° C.; mass spectrum (ion spray): m/z=371.3 (M+1).

1. waitAfter 22 hours
2. washwash it with 1N sulfuric acid
3. extractionextract with ethyl acetate
4. washwash (brine)
5. dry with materialdry (sodium sulfate)
6. customPurify the residue on silica gel using a ethyl acetate/hexanes gradient (5:95 to 10:90)