| 1. | The pyrrole-like rings within are closely related to isoindole.
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| 2. | Ketoesters of this type are useful in the Knorr pyrrole synthesis.
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| 3. | Oxidation of the resulting ring yields the final pyrrole ring C.
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| 4. | Included are pyridine, thiophene, pyrrole, and furan.
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| 5. | Like chlorophyll, the pyrrole pigments are safe to eat.
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| 6. | Knorr's pyrrole can be derivatized in a number of useful manners.
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| 7. | It resembles a pyrrole more than a simple imine.
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| 8. | It is a structural analog of pyrrole, with tin replacing the nitrogen.
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| 9. | The Rothemund synthesis is a condensation and oxidation starting with pyrrole and an aldehyde.
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| 10. | Examples of non-basic nitrogen-containing aromatic rings are pyrrole and indole.
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