Diethyl Ether → Tert-butyl 2-(3-fluoro-4-(2-fluoropyridin-4-yl)phenyl)acetate

Participants

Role	Name	HCID	Charge
Reactant	Diethyl Ether	HCID 3283	—
Reactant	4-(4-Bromo-2-fluorophenyl)-2-fluoropyridine	HCID 58447799	—
Reactant	HCID 178451183	HCID 178451183	—
Catalyst	(1E,4E)-1,5-diphenylpenta-1,4-dien-3-one; palladium	HCID 6505921	—
Catalyst	Ditert-butyl(cyclopenta-2,4-dien-1-yl)phosphane;iron(2+);(2,3,4,5-tetraphenylcyclopenta-1,4-dien-1-yl)benzene	HCID 129828017	—
Solvent	Tetrahydrofuran	HCID 8028	—
Product	Tert-butyl 2-(3-fluoro-4-(2-fluoropyridin-4-yl)phenyl)acetate	HCID 58447777	—

Reaction Conditions

Temperature	100 °C

Reaction Steps

To a sealed tube were added 4-(4-bromo-2-fluorophenyl)-2-fluoropyridine 207-3 (210 mg, 0.76 mmol), 0.5 M (2-tert-butoxy-2-oxoethyl) zinc(II) chloride 86-5 in ether (2.3 mL, 1.14 mmol), Pd(dba)2 (22 mg, 0.04 mmol), Q-phos (54 mg, 0.07 mmol) and THF (5 mL). The reaction mixture was bubbled with nitrogen for 1 minute and stirred at 100° C. for 1 hour. After cooling to room temperature, all the solvents were evaporated and the residue was redissolved in ethyl acetate, washed with water and brine, dried over Na2SO4 and concentrated to dryness by rotary evaporation. The crude product was purified by silica gel flash chromatography and eluted with 20% ethyl acetate in hexane to give tert-butyl 2-(3-fluoro-4-(2-fluoropyridin-4-yl)phenyl)acetate 207-5. MS m/z 306.2 (M+1).

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US08546396B2
Source dataset	uspto-grants-2013_10
ORD ID	ord-e6b90edc62224700832fe0e6dba4e224
Source note	uspto-grants-2013_10