: Among the many reports published on strategies applicable to synthesizing pyrazolines and its analogs, The 1,3-dipolar cycloaddition offers a remarkably wide range of utility. Many 1,3-dipolar cycloaddition reactions used for the synthesis of pyrazolines provide better selectivity, eco-friendly, and less expensive chemical processes. In the presented study, we have reviewed various recently adopted strategies for the synthesis of pyrazoline, which followed the 1,3-dipolar cycloaddition reactions mechanism and classified them based on starting materials such as nitrile imines, diazo compounds, different zwitter ions, chalcones, and isoprene units. The manuscript also focused on the synthesis of pyrazolines starting from Seyferth−Gilbert reagents (SGR) and Psilostachyin (PSH) reagents. We hope this work will help those engaged or have plans to research pyrazoline or its analogs, as synthetic protocols based on starting material are rarely available for pyrazolines. Thus, this article holds a valuable complement to the development of newer pyrazoline and its derivatives.

中文翻译：

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吡唑啉及其类似物：基于底物的合成策略

：在发表的许多关于适用于合成吡唑啉及其类似物的策略的报告中，1,3-偶极环加成提供了非常广泛的实用性。许多用于合成吡唑啉的 1,3-偶极环加成反应提供了更好的选择性、环境友好且更便宜的化学工艺。在本研究中，我们回顾了最近采用的各种吡唑啉合成策略，这些策略遵循1,3-偶极环加成反应机理，并根据腈亚胺、重氮化合物、不同两性离子、查尔酮、和异戊二烯单元。该手稿还重点介绍了从 Seyferth−Gilbert 试剂 (SGR) 和 Psilostachyin (PSH) 试剂开始合成吡唑啉。我们希望这项工作能够帮助那些从事或计划研究吡唑啉或其类似物的人，因为基于起始材料的合成方案很少适用于吡唑啉。因此，本文对新型吡唑啉及其衍生物的开发提供了有价值的补充。