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Synthesis and Bergman cyclization of a beta-extended porphyrenediyne
John D Spence1, Eric D Cline, Domingo M LLagostera
1Trinity University, Department of Chemistry, One Trinity Place, San Antonio, TX, 78212, USA. john.spence@trinity.edu
Chemical Communications (Cambridge, England)
|January 23, 2004
Abstract:
Condensation of a porphyrin-2,3-dione with a 1,2-diaminoarenediyne affords a [small beta]-extended porphyrinic-enediyne: upon thermal Bergman cyclization the quinoxaline spacer positioned between the macrocycle and the enediyne prevents tandem radical cyclization to a picenoporphyrin.