Methanol → HCID 19360028, compound

Participants

Reaction Conditions

Reaction Steps

5-Hydroxy-4-[2-[(2-methylphenoxy)methyl]phenyl]-3(2H)-isoxazolone (31.3 g) was dissolved in 330 mL of 10:1 toluene:methanol and cooled in an ice-water bath. Trimethylsilyl-diazomethane (~2M in hexane) (55 mL) was added dropwise. Gas evolution was observed. The yellow solution was stirred at 25° C. for 2 h. The solution was diluted with 100 mL of water and extracted with ethyl acetate (4×100 mL). The combined organic extracts were dried (Mg SO4), filtered and concentrated under reduced pressure to yield an oil, which was purified by flash chromatography (silica gel; 1:1 hexane:ethyl acetate as eluant). The second eluting component was collected to yield 4.35 g (13%) of the title compound of Step E as a white solid, mp 90-92° C. 1H NMR (CDCl3) δ 7.61(d,1H), 7.35(m,3H), 7.12(m,2H), 6.84(m,2H), 5.12(s,2H), 3.96(s,3H), 3.41(s,3H), 2.24(s, 3H).

Provenance & Evidence