Mono- and di(dechloromethylthioylation) of the dichloromethylarenes by S-methyldiethylthiophosphinate

Proceeding from the electronic structure of the S‑alkyl esters of P(IV) acids the key rout - attack of the thiol sulfur (P-SMe) on the methyne carbon, of the new reaction of the dichloromethylarenes with S‑methyldiethylthiophosphinate was predicted and experimentally confirmed. The processes of the mono- and di(dechloromethylthioylation) on dichloromethyl group are realized. New approach to the synthesis of the arenecarbaldehyde dimethyl dithioacetals was developed without using of gaseous high toxic methyl mercaptan.