反应详情

A solution of bromine (0.70 g, 4.3 mmol) in p-dioxane is added dropwise to a solution of 2-chloro-5-(5-chloro-2-thienyl)pyrrole-3-carbonitrile (1.00 g, 4.1 mmol) in p-dioxane. The reaction mixture is stirred overnight at room temperature and concentrated in vacuo to obtain a residue. Flash chromatography of the residue using silica gel and a (6:1) hexane/ethyl acetate solution gives the title product as a yellow solid, mp >200° C.

1. concentrationconcentrated in vacuo
2. customto obtain a residue