Highly Enantioselective Synthesis of 1,2,3-Substituted Cyclopropanes by Using α-Iodo- and α-Chloromethylzinc Carbenoids
作者:Louis-Philippe B. Beaulieu、Lucie E. Zimmer、Alexandre Gagnon、André B. Charette
DOI:10.1002/chem.201202528
日期:2012.11.12
α‐chlorozinc carbenoids by using a dioxaborolane‐derived chiral ligand. The synthetically useful iodocyclopropane building blocks were derivatized by an electrophilic trapping of the corresponding cyclopropyl lithium species or a Negishi coupling to give access to a variety of enantioenriched 1,2,3‐substituted cyclopropanes. The synthetic utility of this method was demonstrated by the formal synthesis of an
此,我们报告的对映和非对映选择性形成反式-碘和反式通过使用二氧硼戊环衍生的手性配体从-chlorocyclopropanesα碘-和α-chlorozinc卡宾。可以通过亲电捕集相应的环丙基锂物质或使用Negishi偶联剂衍生出可用于合成的碘代环丙烷结构单元,从而获得各种对映体富集的1,2,3-取代的环丙烷。HIV-1蛋白酶抑制剂的正式合成证明了该方法的合成效用。另外,还研究了相关的立体选择性溴环丙烷化。还介绍了有关卤代碘甲基锌类胡萝卜素相对亲电性的新见解。