The one pot, in situ ortho-metalation/silylation of unprotected o-phthalic acids using lithium tetramethylpiperidide (LiTMP) and chlorotrimethylsilane is described. This method gives a straightforward access to silylated phthalic anhydrides. These can be easily converted into the corresponding silylated N-hydroxyphthalimide (NHPI) analogs, which are promising new aerobic oxidation catalysts.
Über siliciumaromatische Verbindungen I. Trimethylsilylphtalsäuren und davon abgeleitete Farbstoffe
作者:H. Hopff、P. Gallegra
DOI:10.1002/hlca.19680510203
日期:1968.1.31
The 3- and 4-trimethylsilyl-phthalic anhydrides have been prepared by oxidation of the corresponding o-xylenes and converted into dyestuffs of the type of phthalocyanines, phthaleins and chinophthalones.