反应详情

To a mixture of 2.85 g of 1,2,3,4-tetrahydronaphthalen-2-ylacetic acid and 13.45 g of WSC.HCl was added 45 ml of methylene chloride under ice-cooling. The mixture was stirred for 5 minutes at room temperature. To this was added a solution of 2.4 g of L-thioproline ethyl ester in 7 ml of methylene chloride at room temperature, and the mixture was stirred for a further 18 hours at the same temperature. The reaction mixture was washed with water, diluted hydrochloric acid, and saturated sodium hydrogen carbonate in this order. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue thus obtained was purified by silica gel column chromatography to produce 3.4 g of 3-(1,2,3,4-tetrahydronaphthalen-2-ylacetyl)-L-thioproline ethyl ester as a colorless oil (yield: 68%).

1. temperaturecooling
2. stirringthe mixture was stirred for a further 18 hours at the same temperature
3. washThe reaction mixture was washed with water, diluted hydrochloric acid, and saturated sodium hydrogen carbonate in this order
4. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
5. customthe solvent was evaporated under reduced pressure
6. customThe residue thus obtained
7. customwas purified by silica gel column chromatography