Intramolecular Diels−Alder Reactions of Siloxacyclopentene Constrained Trienes
作者:Geoff T. Halvorsen、William R. Roush
DOI:10.1021/ol070858u
日期:2007.5.1
The synthesis of siloxacyclopentene-constrained trienes 7 and 10 and studies of their IMDA cycloadditions are described. The use of appropriately chosen thermal or Lewis acid conditions allows for cycloadducts 3-6 to be obtained with high levels of diastereoselectivity. These adducts possess trans-relationships between the hydroxyl group and the adjacent ring fusion proton, a stereochemical relationship