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Easy to handle and reusable catalysts based on earth\u2010abundant metals are especially attractive for these syntheses. We report here on the synthesis of 3,4\u2010dihydro\u20102<jats:italic>H<\/jats:italic>\u2010pyrroles via the hydrogenation and cyclization of nitro ketones. The latter are easily accessible from three components: a ketone, an aldehyde and a nitroalkane. Our reaction has a broad scope and 23 of the 33 products synthesized are compounds which have not yet been reported. The key to the general hydrogenation\/cyclization reaction is a highly active, selective and reusable nickel catalyst, which was identified from a library of 24 earth\u2010abundant metal catalysts.<\/jats:p>","DOI":"10.1002\/chem.202201307","type":"journal-article","created":{"date-parts":[[2022,5,31]],"date-time":"2022-05-31T05:37:01Z","timestamp":1653975421000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Synthesis of 3,4\u2010Dihydro\u20102<i>H<\/i>\u2010Pyrroles from Ketones, Aldehydes, and Nitro Alkanes via Hydrogenative Cyclization"],"prefix":"10.1002","volume":"28","author":[{"given":"Barbara","family":"Klausfelder","sequence":"first","affiliation":[{"name":"Anorganische Chemie II Catalyst Design Sustainable Chemistry Centre University of Bayreuth  Universit\u00e4tsstra\u00dfe 30 95440 Bayreuth Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia","family":"Blach","sequence":"additional","affiliation":[{"name":"INM - Leibniz Institute for New Materials  Campus D2 2 66123 Saarbr\u00fccken Germany"},{"name":"Department of Physics Saarland University  Campus D2 2 66123 Saarbr\u00fccken Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niels","family":"de Jonge","sequence":"additional","affiliation":[{"name":"INM - Leibniz Institute for New Materials  Campus D2 2 66123 Saarbr\u00fccken Germany"},{"name":"Department of Physics Saarland University  Campus D2 2 66123 Saarbr\u00fccken Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9138-4155","authenticated-orcid":false,"given":"Rhett","family":"Kempe","sequence":"additional","affiliation":[{"name":"Anorganische Chemie II Catalyst Design Sustainable Chemistry Centre University of Bayreuth  Universit\u00e4tsstra\u00dfe 30 95440 Bayreuth Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,7,6]]},"reference":[{"key":"e_1_2_8_1_1","unstructured":"\u00a0"},{"key":"e_1_2_8_2_2","first-page":"223","volume":"172","author":"Mignonac G.","year":"1921","journal-title":"Compt. 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