A hetero Diels-Alder reaction is a variation of the
Chapter 17, Problem 17.72(choose chapter or problem)
A hetero Diels-Alder reaction is a variation of the Diels-Alder reaction in which one or more of the carbon atoms of the diene and/or the dienophile are replaced by other atoms such as oxygen or nitrogen. With this in mind, propose a mechanism consistent with the following transformation in which a multifunctional acyclic reactant produces a macrocyclic (large ring) product (Org. Lett. 2001, 3, 723726): O O O O O O O O Ph Ph Ph O O O O 195C
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