The cover picture, provided by Simona Ceccarelli, Tanja Schulz-Gasch and Serena Fantasia, illustrates the coupling of heteroaryl bromides with gaseous ammonia catalyzed by copper(II) acetylacetonate. Under the reported conditions, a broad range of nitrogen and sulfur-containing substrates affords heteroarylamines in good to very good yields. Unstable aminothiophenes and aminobenzothiophenes can be further reacted in situ to afford stable derivatives. The use of gaseous ammonia allows the reaction to occur in the absence of any ligand or additives, bringing noticeable advantages in terms of cost, purification and waste production. This methodology is illustrated in the communication by Fantasia and colleagues on pages 627–631.
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