Dibenzo[de,g]quinolines 5were formed by the palladium-catalysed heteroannulation of disubstituted alkynes and 1-iodo-10-(dimethylamino)phenanthrene (3c). Symmetric alkynes led to high levels of regioselectivity. These reactions constitute a new synthesis of the B-ring system of aporphine heterocycles.
二苯并[de,g]喹啉5由钯催化的双取代炔烃和1-碘-10-(二甲氨基)菲(3c)的杂环化形成。对称炔烃导致高水平的区域选择性。这些反应构成了阿朴啡杂环 B 环系统的新合成。