Direct syntheses of polyfused ring systems by intramolecular tandem palladium-ene/Heck insertion reactions
摘要:
The Pd(0)-catalyzed polycyclizations 1 --> 3 + 4, 5 --> 9 and 6 --> 10 are described. The stereospecifity of these transformations is ascribed to an intramolecular suprafacial "palladium-ene" process followed by one to two "Heck-insertions" proceeding with retention of configuration at the metalated carbon.
Direct syntheses of polyfused ring systems by intramolecular tandem palladium-ene/Heck insertion reactions
摘要:
The Pd(0)-catalyzed polycyclizations 1 --> 3 + 4, 5 --> 9 and 6 --> 10 are described. The stereospecifity of these transformations is ascribed to an intramolecular suprafacial "palladium-ene" process followed by one to two "Heck-insertions" proceeding with retention of configuration at the metalated carbon.