Well-Documented Applications of p-Phenylenediamine in the Synthesis of Heterocycles and Heterocrown Ethers

Introduction

The broad importance of p-phenylenediamine functionality is reflected from its wide applications in various fields of chemistry, such as in the production of pigments, dye intermediates, hair dyes, rubber antioxidants, photographic developer and lithography plates, p-aromatic poly­amide fiber, etc. Apart from these wide applications in industrial chemistry, it is a reagent of choice for the synthesis of heterocycles, heterocrown ethers, and amine-­terminated aromatic polyamide dendrimers. [¹-5]

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