Synthesis of Tricyclic Isoquinoline Derivatives via Palladium-Catalyzed Tandem Reactions of 2,7-Alkadiynylic Carbonates with 2,3-Allenyl Sulfamides

摘要

The palladium-catalyzed tandem reactions of 2,7-alkadiynylic carbonates with 2,3-allenyl sulfamides for the syntheses of fused tricycles such as 1,3,6,7,8,9-hexahydrofuro[3,4-h] isoquinoline, 2,3,6,7,8,9-hexahydro-1H-pyrrolo[3,4-h]isoquinoline, and 2,3,4,7,8,9-hexahydro-1H-cyclopenta[h]isoquinoline derivatives have been developed. A mechanism has been proposed based on the isolation of a by-product.