Triethoxysilane → Benzoxazole

Participants

Reaction Conditions

Reaction Steps

A 250 ml round bottom flask, equipped with a reflux condenser and an oil bath with a magnetic stirrer was charged with 4.0 g (22 mmol) triethoxysilane and 5.0 g (20 mmol) of the above 2-(4-allyloxyphenyl)-benzoxazole in 100 ml of toluene under nitrogen atmosphere. The reaction mixture was heated to 70° C. and a catalytic amount of divinyl-tetramethyl disiloxane platinum complex was added. After the reaction mixture was heated for 2 hours, another 1.8 g (11 mmol) triethoxysilane were added and the reaction mixture was stirred over night. The product solution was evaporated, diluted with toluene and filtrated over Celite to yield 8 g (96%) of crude (4-(3-(triethoxysilyl)propyloxy])phenyl)-benzoxazole. UV (ethanol) 308 nm (23′468).

Provenance & Evidence