Here, the latest synthetic methods of C1-functionalization of THIQs are classified into two main categories, namely C1-Functionalization and C1-Functionalization with annulation. Each main category is in turn divided to two subcategories including N-unsubstituted THIQs and N-substituted THIQs. These subcategories are further subdivided based on the type of substituents at the 1-position of the synthesized THIQs.

中文翻译：

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C1-1,2,3,4-四氢异喹啉 (THIQ) 的功能化

在这里，最新的 THIQ 的 C1 功能化合成方法分为两大类，即 C1 功能化和 C1 功能化与环化。每个主要类别又分为两个子类别，包括N-未取代 THIQ和N-取代 THIQ。这些子类别根据合成的 THIQ 的 1 位取代基的类型进一步细分。