Fragmentation Reactions of Optically Active Trisubstituted Cyclopropylcarbinyl Radicals
作者:Yuki Takekawa、Kozo Shishido
DOI:10.1021/jo010728d
日期:2001.12.1
optically pure alkene derivatives. These derivatives possess three chemically distinct functionalities, making them excellent chiral building blocks for the construction of biologically active molecules. The synthetic usefulness of the procedure developed here has been demonstrated by an application to the enantioselective synthesis of both enantiomers of the key intermediate, 4-(3,4-methylenediox
描述了光学活性三取代的环丙基羰基自由基的断裂反应及其在天然产物合成中的应用。用于自由基断裂反应的光学纯底物的制备有效地通过脂肪酶介导的sigma对称3取代的1,2,2-环丙二甲醇的不对称化来完成。在自由基稳定基团例如芳基,酯或α,β-不饱和酯的存在下,断裂选择性地发生以在该基团的α-碳上产生自由基并提供光学纯的烯烃衍生物。这些衍生物具有三种化学上不同的功能,使其成为构建生物活性分子的出色手性构建基。