Synthesis of Novel Pyrrolic Compounds from Nitroarenes and Isocyanoacetates Using a Phosphazene Superbase
作者:Timothy D. Lash、Michelle L. Thompson、Tonya M. Werner、John D. Spence
DOI:10.1055/s-2000-6504
日期:2000.2
Utilization of a phosphazene base allows hitherto unreactive nitroaromatic compounds to condense with ethyl isocyanoacetate to give c-annelated pyrroles. On the other hand, 3-nitropyridine reacted under these conditions to give a novel tricyclic heterocycle 13 in modest yield.
aromatics such as nitrobenzene or nitronaphthalenes and give the corresponding pyrroles in good yields. Pyrroles prepared by this method have been converted into porphyrins fused with various aromatic rings by the reduction with LiAlH4 followed by treatment with an acid catalyst and oxidation with chloranil or oxygen. Tetra-1,2-naphthoporphyrin has been prepared by the reaction of 2-nitro-3,4-dihydronaphthalene