The fascinating construction of pyridine ring systems by transition metal-catalysed [2 + 2 + 2] cycloaddition reactions - Chemical Society Reviews (RSC Publishing)
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Synthesis of Nitrogen Heterocycles by the Ring Opening of Pyridinium Salts - Kearney - 2006 - Angewandte Chemie International Edition - Wiley Online Library
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Pyridine is a benzene ring with one of the carbon atoms substituted with nitrogen. What are the hybridizations of atoms 1 and 2 respectively in the structure of pyridine? | Homework.Study.com
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