2-Fluorobenzoyl chloride → HCID 54429599, 화합물

Compounds of Formula 7 are commercially available or can be prepared by methods known to those of ordinary skill in the art. For example, a compound of Formula 7 in which L is fluoro, R1 is oxazol-2-yl and R2 is hydro (i.e., 2-fluoro-1-oxazol-2-ylbenzene) can be prepared by reacting 2-fluorobenzoic acid chloride with 2-bromoethylamine hydrobromide to give 2-fluoro-1-(4,5-dihydrooxazol-2-yl)benzene and then oxidizing. The reaction with the 2-bromoethylamine hydrobromide is carried out in the presence of a suitable base, typically a nitrogen base (e.g., triethylamine, N,N-diisopropylethylamine, etc., preferably triethylamine) and in a suitable solvent (e.g., benzene, methylene chloride, DMF, toluene, THF, any appropriate mixture of suitable solvents, etc., preferably benzene) at 50° to 110° C., typically at 100° to 110° C. and preferably at reflux, and requires 2 to 20 hours. The oxidation can be carried out with a suitable oxidizing agent (e.g., nickel peroxide hydrate, manganese dioxide, etc., preferably nickel peroxide hydrate) in a suitable solvent (e.g., benzene, methylene chloride, 1,2-dichloroethane, decalin, any appropriate mixture of suitable solvents, etc., preferably benzene) at 20° to 150° C., typically at 50° to 120° C. and preferably at reflux, and requires 2 to 40 hours. Further details of the process steps set forth in this paragraph are provide in Example 15, infra.