Aliquatreg; 336; potassium carbonate in toluene T=60°C; 5 h;

pyridine; pyridinium hydrobromide perbromide complex; tetrabutylammomium bromide in dichloromethane-d2; water 2 h; Ambient temperaturevar. reagents and solvents; other thioketals of ketoesters, ketoacids and ketoaldehydes; Product distribution;