Approaches to the stepwise synthesis of
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Raymond Bonnett; Kawulia Okolo
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Article
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1999
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John Wiley and Sons
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English
β 93 KB
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An azadibenzoporphyrin (13,17-diethyl-12,18-dimethyl-5-azadibenzo[b,g]porphyrin, 6) is prepared by a 2 Γ 2 synthesis from a 1-bromobenzopyrromethene precursor by treatment with sodium azide at 140 Β°C in solvent. Yields depend on solvent, 35% being obtained in quinoline and 84% in DMF. Treatment of 1