Highly Stereoselective Radical Cyclization of Haloacetals Controlled by the Acetal Center
作者:Félix Villar、Tanja Kolly-Kovac、Olivier Equey、Philippe Renaud
DOI:10.1002/chem.200390180
日期:2003.4.4
A systematic investigation of radical haloacetal cyclizations (Ueno-Stork reaction) where the acetal center is the unique stereogenic element is reported. This highly diastereoselective reaction can be used for the preparation of polysubstituted tetrahydrofurans and gamma-lactones. We report herein the full experimental details of reactions where up to three new chiral centers are created. To demonstrate
报道了系统的自由基卤缩醛环化(Ueno-Stork反应)的研究,其中缩醛中心是独特的立体生成元素。该高度非对映选择性反应可用于制备多取代的四氢呋喃和γ-内酯。我们在此报告了最多创建三个新手性中心的反应的全部实验细节。为了证明这种方法的潜力,已经实现了与生物活性木脂素相关的(+)-依加醇化物和三环缩醛的短合成。