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A high\u2010yield, one\u2010pot synthesis of anionic annulated 1,3,4\u2010azadiphospholides from Na(OCP) and 2\u2010chloropyridines is presented. The synthesis proceeds without the use of transition metals and tolerates a wide range of substrates. Cyano\u2010substituted compounds are especially deeply colored and have absorption maxima which range from <jats:italic>\u03bb<\/jats:italic><jats:sub>max<\/jats:sub>=525 to 596\u2005nm. The optical properties are dominated by the spatial separation of an electron acceptor and donor unit within one molecule (push\u2013pull chromophore). The anionic 1,3,4\u2010azadiphospholides are silylated to neutral siloxy compounds with a strong blue\u2010shifted absorption. This reaction can be reversed by addition of fluoride ions, which allows fluoride ions to be detected in optically low concentrations.<\/jats:p>","DOI":"10.1002\/anie.201705473","type":"journal-article","created":{"date-parts":[[2017,7,17]],"date-time":"2017-07-17T11:18:37Z","timestamp":1500290317000},"page":"11226-11231","source":"Crossref","is-referenced-by-count":41,"title":["Annulated 1,3,4\u2010Azadiphospholides: Heterocycles with Widely Tunable Optical Properties"],"prefix":"10.1002","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0114-7536","authenticated-orcid":false,"given":"Riccardo","family":"Suter","sequence":"first","affiliation":[{"name":"Department of Chemistry and Applied Biosciences ETH Zurich  8093 Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6647-8320","authenticated-orcid":false,"given":"Zolt\u00e1n","family":"Benk\u0151","sequence":"additional","affiliation":[{"name":"Budapest 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