A facile synthetic method has been developed for the conversion of methyl salicylate (5) into flavones 1a-i in high yields. Compound 5 on treatment with t-butyldimethylsilyl chloride (6) gave the O-silyl protected ester 7. Condensation of this ester 7 with the lithium anion generated from acetophenones 3a-i yielded the 1.3-diarylpropane-1, 3-diones 8a-i, which on treatment with glacial acetic acid containing 0.5% H2SO4 for 3 h at 95-100° C provided ...
![methyl 2-[tert-butyl(dimethyl)silyl]oxybenzoate结构式](https://image.chemsrc.com/caspic/190/69404-96-2.png)
