反应详情

To a freshly prepared solution of sodium-4-methyl benzene thiolate (prepared from 42 g of 4-methyl benzene thiol and 14 g of sodium hydroxide) in toluene (700 mL) was added 7-methoxy-2-methylbenzo[b]furan-4-carboxaldehyde (50.0 g) at reflux. Then HMPA (62.0 g) was added slowly and reaction mixture was stirred at the same temperature for 4-5 hr. reaction mixture was then bring to 50-60° C., water (500 mL) was added and layers were separated. The aqueous layer was acidified (pH 4-5). The solid separated was filtered, washed with water (3×200 mL) and dried to get light yellow solid product (44.0 g).

1. temperatureat reflux
2. customreaction mixture
3. customreaction mixture
4. customwas then bring to 50-60° C.
5. customlayers were separated
6. customThe solid separated
7. filtrationwas filtered
8. washwashed with water (3×200 mL)
9. customdried