Lawesson's reagent → 4-(2,3-Dichlorophenyl)pyrrole-3-thiocarboxamide

Participants

Reaction Steps

A mixture of 4-(2,3-dichlorophenyl)pyrrole-3-carboxamide (0.98 g, 3.8 mmol) and 2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide (0.77 g, 1.9 mmol) in tetrahydrofuran is heated at reflux for 75 minutes, cooled and concentrated in vacuo to obtain a residue. Chromatography of the residue using silica gel and a 1:1 hexane/ethyl acetate mixture gives the title product as a yellow solid (0.54 g, mp 128°-132° C.).

Provenance & Evidence