反应详情

To a solution of 2.53 g (5.9 mmol) of 6-(p-chlorophenylsulfonamido)-2-[3-(3-pyridyl)propyl]-hexanoic acid in 150 ml ethanol is slowly added 1.5 ml (20.5 mmol) thionyl chloride and the reaction mixture is subjected to reflux for 8 h. The solvent is evaporated and the residue is adjusted to pH 8 using 1N aqueous sodium hydroxide solution. The mixture is then extracted with methylene chloride (2×50 ml). Combined organic extracts are dried (MgSO4) and evaporated to give an oil which is then purified by flash chromatography using ether as the eluent to obtain ethyl 6-(p-chlorophenylsulfonamido)-2-[3-(3-pyridyl)propyl]-hexanoate as an oil.

1. temperatureto reflux for 8 h
2. customThe solvent is evaporated
3. extractionThe mixture is then extracted with methylene chloride (2×50 ml)
4. dry with materialCombined organic extracts are dried (MgSO4)
5. customevaporated
6. customto give an oil which
7. customis then purified by flash chromatography