反应详情

A solution of DEAD (404 mg, 2.32 mmole) in THF (0.5 mL) was added to a solution of 7-bromo-2-chloroquinazolin-8-ol (400 mg, 1.54 mmole), tert-butyl 4-hydroxypiperidine-1-carboxylate (621 mg, 3.09 mmole) and PPh3 (610 mg, 2.32 mmole) in THF (5.5 mL) at RT. After 1.5 hours, silica gel was added to the reaction which was evaporated to dryness and loaded onto a flash column. The product was eluted with 25% EtOAc/hexane to give tert-butyl 4-(7-bromo-2-chloroquinazolin-8-yloxy)piperidine-1-carboxylate in 80% yield (545 mg, 1.23 mmole).

1. additionsilica gel was added to the reaction which
2. customwas evaporated to dryness
3. washThe product was eluted with 25% EtOAc/hexane