Consiglio Nazionale Delle Ricerche

Valeria Regondi

Rita Fochi

Iacopo Degani

Margherita Barbero

A new process is described for the preparation of trithiocarbonic acid esters of formula: ##STR1## in which R and R.sub.1, which can be the same or different, are aliphatic, alicyclic, aromatic or heterocyclic radicals. The new process is characterized in that an organic hydrosulphide and a base, or an inorganic sulphide, are reacted with carbon disulphide and an organic halide in stoichiometric proportions in the absence of organic solvents, in the presence of an aqueous phase and a phase transfer catalyst.

Process for preparing trithiocarbonic acid diesters

Process for preparing alkyl-sulphonyl chlorides and arylalkyl-sulphonyl chlorides of formula RSO.sub.2 Cl (R being alkyl or arylalkyl), starting from S,S-dialkyl or diarylalkyl dithiocarbonates RS--CO--SR, consisting in reacting the starting compound with gaseous chlorine in the presence of water, at 0.degree.-+10.degree. C.

Process for preparing alkyl-sulphonyl chlorides and arylalkyl-sulphonyl

A process for preparing organic thioethers of formula R--S--R.sub.1 in which R is an aliphatic, aryl, arylaliphatic or heterocyclic radical and R.sub.1 is an aliphatic or arylaliphatic radical, from organic dithiocarbonates and organic halides or sulphonates, in the presence of an aqueous alkaline base and a phase transfer catalyst, at a temperature of between 50.degree. and 100.degree. C. for a time of 10-60 minutes.

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Turin, Italy

Valeria Regondi