反应详情

Thiophene-2-ylmethyl triphenylphosphonium chloride (4.4 g, 16.3 mmol) was added to THF (50 ml), and PhLi (8.6 g of 19% solution in hexane, 19.6 mmol) was added dropwise thereto in an ice bath. After 20 minutes, 2,2-dimethylpropionic acid 2-[(4-formyl-3-methoxyphenyl)methylamino]ethyl ester (4.0 g, 13.6 mmol) dissolved in THF (15 ml) was added dropwise. The mixture was reacted for 2 hours. The reaction mixture was added to 300 ml of ice water, and the oily matter was subjected to 3 times of extraction with dichloromethane (50 ml). Washing with a saturated saline solution, drying over Na2SO4, and concentration were performed. The residue was purified by silica gel chromatography to give a yellow oily matter (yield: 4.0 g (79.3%)).

1. additionwas added dropwise
2. additionwas added dropwise
3. customThe mixture was reacted for 2 hours
4. extractionthe oily matter was subjected to 3 times of extraction with dichloromethane (50 ml)
5. washWashing with a saturated saline solution
6. dry with materialdrying over Na2SO4, and concentration
7. customThe residue was purified by silica gel chromatography
8. customto give a yellow oily matter (yield: 4.0 g (79.3%))