Consiglio Nazionale Delle Ricerche

Oxon Italia S.p.a.

Rita Fochi

Iacopo Degani

Valeria Regondi

Edoardo Pallucca

Gianni Carvoli

Claudio Ornati

Anna Maria Serri

Sonia Gazzetto

Jacopo Degani

Claudia Fenoglio

Margherita Barbero

Silvano Cadamuro

Mara Migliaccio

Process to prepare alkyl-ureas from O,S-dimethyl dithiocarbonate

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.

Process for preparing organic sulphides

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Turin, Italy

Rita Fochi