Intramolecular [4+4]-photocycloadditions of 2-pyrones: an efficient approach to cyclooctanoid construction
摘要:
2-Pyrones 2 bearing pendant furans underwent efficient intramolecular crossed [4 + 4]-cycloaddition to give fused bicyclic cyclooctadienes 3 and 4 bridged by lactones and ethers, along with varying amounts of [2 + 2]-adducts 5.
Intramolecular [4+4]-photocycloadditions of 2-pyrones: an efficient approach to cyclooctanoid construction
摘要:
2-Pyrones 2 bearing pendant furans underwent efficient intramolecular crossed [4 + 4]-cycloaddition to give fused bicyclic cyclooctadienes 3 and 4 bridged by lactones and ethers, along with varying amounts of [2 + 2]-adducts 5.