Methanol → HCID 59818345, compound

Participants

Reaction Steps

An 8.2 g quantity of a mixture of 4′-fluoro-5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl)methanol 16b and 4′-fluoro-5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-carbaldehyde 56 [obtained, as a mixture, from a Suzuki coupling by methods described in WO2007/005572] was dissolved along with sulfamic acid (3.3 g) in a mixture of THF (50 mL) and water (50 mL) The solution was cooled in an ice bath. A solution of 80% NaClO2 (2.6 g) in water (50 mL) was added dropwise from an addition funnel. When addition was complete, the mixture was stirred at <8° C. for 1.5 hr. The mixture was quenched by addition of water and extracted with EtOAc. The organic phase was concentrated under reduced pressure to a volume of ˜50 mL and extracted with 2N KOH (20 mL×2). The organic phase was reserved. The aqueous solution was acidified to pH 2, and the solid filtered, to yield 300-400 mg of product 57 as a first crop. The reserved organic solution was concentrated under reduced pressure and the resulting crude product purified by chromatography on silica gel to give a total of 1.4-1.5 g of 57.

Provenance & Evidence