Abstract
Plant growth regulators (PGRs) are chemical substances that imitate the functions of phytohormones to enhance the crop yield and the harvest process. Phenylurea-derived plant growth regulators are known for their excellent efficacy in promoting fruit growth, particularly in kiwifruit, grapes, and melons. Phenylurea derivatives represent one class of the highly efficient and versatile PGRs. Specifically, forchlorfenuron (CPPU, N-(2-chloro-4-pyridinyl)-N′-phenylurea) exhibits similar growth-regulating efficacy to cytokinins and has a significant impact on the plant growth and the crop yield. As a result, there is growing interest in exploring the incorporation of various phenylurea moieties into agrochemicals to enhance their regulatory properties on crops. This review aims to provide a comprehensive overview on representative synthetic approaches for phenylurea derived PGRs. Additionally, we provide our perspective on the future development in this active research field.
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