These reagents suffer from either one or more of the following disadvantages such as, availability of the reagent, cumbersome work-up procedure, high cost of the reagent, over ST 2825 or oxidation of other functional groups. As a result, there is still a need for the development of general, efficient, and new reagents to synthesize carbonyl compounds from the corresponding arenes under mild reaction conditions.
Herein, we have reported the synthesis and application of 1,4-bis(triphenyl phosphonium)butane peroxodisulfate (BTPPBPDS) as an efficient and selective oxidant in non aqueous medium that use of a mild, efficient, inexpensive, simple, convenient and selective method for the oxidation of alkylbenzenes to their corresponding carbonyl compounds with (BTPPBPDS) under neutral conditions and in the absence of metal catalysts.
2.1. Materials and methods
Arenes, dialkyl halid, PPh6, K2S2O8 (Merck, P.A.) were used without further purification. Solvents were purified by standard methods. Infrared spectra were recorded as KBr disks on a Shimadzu model 420 spectrophotometer. The UV/Vis measurements were made on an Uvicon model 922 spectrometer. 1H and 13C (for product) were carried out on a Bruker AVANCE DRX 500 spectrometer at 500, 125 and 470.66 MHz. All the chemical shifts are vaccination quoted in ppm using the high-frequency positive convention; 1H and 13C NMR spectra were referenced to external SiMe4 and 19F NMR spectra to external CFCl3. The relative concentrations of carbon, hydrogen and nitrogen were obtained from the microanalytical laboratories, Department of Chemistry, OIRC, Tehran. Melting points were measured on an Electrothermal 9100 melting point apparatus.