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The photolysis of the vinylogous enaminonitrile 1,3-dicyano-4-amino-1,3-butadiene yields 6-aminonicotinonitrile. The latter reaction affords an efficient route to a nicotinamide derivative from cyanoacetylene.<\/jats:p>","DOI":"10.1126\/science.166.3906.765","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T12:14:21Z","timestamp":1160050461000},"page":"765-766","source":"Crossref","is-referenced-by-count":40,"title":["Photochemical Reactions and the Chemical Evolution of Purines and Nicotinamide Derivatives"],"prefix":"10.1126","volume":"166","author":[{"given":"J. P.","family":"Ferris","sequence":"first","affiliation":[{"name":"Department of Chemistry, Rensselaer Polytechnic Institute, Troy, New York 12181"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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