METHOD FOR PREPARING BENZOYL CHLORIDE Russian patent published in 2007 - IPC C07C22/04 C07C17/14 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of benzoyl chloride. Method involves the chlorination reaction of toluene with sulfuryl chloride (SO₂Cl₂) at heating in the presence of organic peroxide as an initiating agent. As an organic peroxide methods involves using peroxyacetals taken in the measured amount 0.001-0.005 mole per mole of toluene prepared into a chlorinating device (in situ) from tert.-butyl hydroperoxide and ether by effect with SO₂Cl₂. The reaction temperature is maintained to be 50-60°C for 0.5 h. As tert.-butyl hydroperoxide and ether tetrahydrofuran or diethyl ether can be used taken in the mole ratio = 1:(5-7) that are dosed to toluene separately or as a solution followed by charging SO₂Cl₂, or hydroperoxide solution in ether is dosed to a mixture of toluene with sulfuryl chloride. Invention provides the high yield and quality of the end product, improving and simplifying procedure for its isolation.

EFFECT: improved method of synthesis.

2 cl, 2 tbl, 3 dwg, 9 ex