Conformational effects in diastereoselective aryne Diels-Alder reactions: synthesis of benzo-fused [2.2.1] heterobicycles.
It was found that the diastereoselectivity of the Diels-Alder reaction between arynes and substituted furans is highly sensitive to substitution, which affects the reactive conformation. By varying the location of the groups on the diene partner, it is possible to obtain both excellent chemical yields and high stereoselectivity. This methodology offers rapid and convenient access to enantiomerically pure bicyclic scaffolds which are difficult to prepare by other means.
Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6.
Robert
R
Webster
Mark
M
Lautens
D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000138:chemical synthesis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D013237:Stereoisomerism; D013379:Substrate Specificity
D019086:Bridged Bicyclo Compounds, Heterocyclic