Diphenyl sulfide, peroxyacid reduction

Diphenyl-1 -pyrenylphosphine hydroperoxide determination, 679-80 peroxide value, 659, 680 Diphenyl sulfide, peroxyacid reduction, 700-1 Dipolar intermediate, ene reaction, 853 Dipole moments, dioxiranes, 1132 DIPT (diisopropyl tartrate), 395 Dipyridamole, low-density hpoprotein antioxidant, 611 Di radicals... 

The Baeyer-Villiger process for conversion of open-chain ketones to esters, or cyclic ketones to lactones by a peracid involves an intermediate a-hydroxyperester (235) step, as shown in equation 83. Determination of 235 in the reaction mixture involves selective reduction of the peroxyacid with diphenyl sulfide and reduction of 235 with excess iodide, followed by titration of the liberated iodine. The presence of various transition metal ions may affect the determination by accelerating the final step of the synthetic process, thus... 

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