Tributylvinyltin → HCID 68182011, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-4,5-dihydronaphtho[2,1-d]oxazol-7-yl trifluoromethanesulfonate (Preparation 48A, 140 mg, 0.264 mmol) in dioxane (1 mL) in a 150 mL sealed tube were sequentially added tributyl(vinyl)tin (0.085 mL, 0.290 mmol), lithium chloride (33.6 mg, 0.792 mmol), and tetrakis(triphenylphosphine)palladium(0) (30.5 mg, 0.026 mmol). The solution was purged with argon for 5 mins. It was stirred for 20 hrs in a 100° C. oil bath. After cooling, the solution was diluted with ˜20 mL of ether and filtered thru CELITE® and evaporated to give an oily residue. The residue was purified by Combiflash (24 g silica gel) eluting with 1:9 followed by 2:8 EtOAc-hexane to give 2-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-7-vinyl-4,5-dihydronaphtho[2,1-d]oxazole (49.4 mg, 46% yield). LC/MS M+1=409.25.

Provenance & Evidence