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- W1978094810 abstract "Abstract A reaction in organic chemistry that creates either furans, pyrroles, or thiophenes from 1,4-dicarbonyl compounds is called Paal–Knorr synthesis. It is a synthetically valued process for gaining substituted furans, pyrroles and thiophene, common structural components of many and variety of biologically active natural products. It was originally described separately by German chemists Carl Paal and Ludwig Knorr in 1884 as a method for the synthesis of furans, and then has been modified for the synthesis of pyrroles and thiophenes. The Paal–Knorr reaction is relatively versatile and multipurpose. In this reaction, almost all dicarbonyls can be converted to their corresponding heterocycles. The Paal–Knorr originally is considered limited by harsh reaction conditions, such as prolonged heating in acid, which may degrade sensitive functionalities in many potential precursors. However, contemporary approaches allow for much milder conditions by avoiding, heat altogether, including microwave irradiation along with use of environmentally benign catalyst required for cyclizations." @default.
- W1978094810 created "2016-06-24" @default.
- W1978094810 creator A5043056910 @default.
- W1978094810 creator A5065723896 @default.
- W1978094810 date "2014-01-01" @default.
- W1978094810 modified "2023-10-16" @default.
- W1978094810 title "Paal–Knorr Reaction in the Synthesis of Heterocyclic Compounds" @default.
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