2,4‐Bis(4‐methylpheylthio)‐1,3,2λ 5 ,4λ 5 ‐dithiadiphosphetan‐2,4‐dithion: Ein neues Reagens zur Schwefelung von N , N ‐disubstituierten Amiden

2,4‐Bis(4‐methylphenylthio)‐1,3,2λ 5 ,4λ 5 ‐dithiadiphosphetane‐2,4‐dithione: A New Reagent for Thiation of N , N ‐Disubstituted Amides As a new reagent for the thiation of amides, the easily accessible 2,4‐bis(4‐methylphenylthio)‐1,3,2λ 5 ,4λ 5 ‐dithiadiphosphetane‐2,4‐dithione ( 9 ) shows a remarkable selectivity. This selectivity – the preferred thiation of N , N ‐disubstituted amides – is complementary to the one of the well known Lawesson reagent . Thiation of diamides of type 2 with 9 leads via cyclization of the corresponding dithiodiamides to 1,3‐thiazole‐5(4 H )‐thiones 1 ( Scheme 3 ).