反应详情

A solution of 1.0 g (3.04 mmol) of trans-4-(5-Bromo-pentyl)-cyclohexylammonium bromide in 12 ml CH2Cl2 was first cooled at 0° C., treated with 0.8 g (3.27 mmol) 4-(trifluoromethyl)benzenesulfonylchloride and then with 1.2 ml (7.01 mmol; 2.3 equivalents) of Hünig's base (during 30 min). After total 1.5 h at 0° C., the mixture was dissolved in aqueous 10% KHSO4/TBME (3×). The organic phases were washed with aqueous saturated NaHCO3 and aqueous 10% NaCl, dried over Na2SO4 and evaporated to give 1.38 g crude product which was crystallized (CH2Cl2/hexane) to give 1.26 g (91%) of pure trans-N-[4-(5-Bromo-pentyl)-cyclohexyl]-4-trifluoromethyl-benzenesulfonamide, MS: 454 (M−H−, 1Br).

1. washThe organic phases were washed with aqueous saturated NaHCO3 and aqueous 10% NaCl
2. dry with materialdried over Na2SO4
3. customevaporated
4. customto give 1.38 g crude product which
5. customwas crystallized (CH2Cl2/hexane)