Abstract The indoloquinoline alkaloids cryptolepine (1), neocryptolepine (2), isocryptolepine (3), and isoneocryptolepine (4) are important tools in traditional medicine. Now, their precursors 1a–4a were synthesized in two steps starting from the corresponding bromo- iodoquinolines. Our strategy is based on palladium-catalyzed reactions, applying regioselective Buchwald–Hartwig amination on 2, 3-and 3, 4-dihaloquinolines followed by ...
![11H-indolo[3,2-c]quinoline结构式](https://image.chemsrc.com/caspic/053/239-09-8.png)
![7H-吲哚并[2,3-c]喹啉结构式](https://image.chemsrc.com/caspic/047/205-32-3.png)
![10H-吲哚并[3,2-b]喹啉结构式](https://image.chemsrc.com/caspic/317/243-58-3.png)
![11H-10,11-二氮杂苯并[b]芴结构式](https://image.chemsrc.com/caspic/241/243-38-9.png)
