NULEAR CHLORINATING METHOD OF TOLUENE

PURPOSE:To obtain p-chlorotoluene industrially and advantageously, by the nuclear chlorination of toluene in the presence of a specific pheoxathiin compound, a chlorinated compound thereof or a mixture thereof capable of giving a very high selectivity for the p-position as a co-catalyst. CONSTITUTIO...

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Hauptverfasser:	ABE YOSHIHIKO, SUGANO SUEO, HATSUTORI RIYOUJI, MAEDA SATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain p-chlorotoluene industrially and advantageously, by the nuclear chlorination of toluene in the presence of a specific pheoxathiin compound, a chlorinated compound thereof or a mixture thereof capable of giving a very high selectivity for the p-position as a co-catalyst. CONSTITUTION:Toluene is subjected to the nuclear chlorination in the presence of a Lewis acid as a catalyst to give a nuclear chlorinated toluene. In the process, one or more selected from phenoxathiin compound expressed by the formula (R is methyl group at the 1-and/or 3-position; m is an integer 0-2; X is Cl when m is 0, and H when m is 1-2), e.g. 6,9-dimethyl-2,8-dichlorophenoxathiin or a chlorinated phenoxathiin compound prepared by the further high chlorination thereof or a mixture thereof are used as a co-catalyst. The reaction is preferably carried out at 0-40 deg.C due to the high selectivity for the p-position of the co- catalyst at a low temperature.