High Regiocontrol in the Zinc-Mediated Crotylation of Aldehydes and Ketones: A Straightforward and Facile Approach to Linear Homoallylic Alcohols in DMPU
作者:Li-Ming Zhao、Li-Jing Wan、Hai-Shan Jin、Shu-Qing Zhang
DOI:10.1002/ejoc.201101847
日期:2012.5
α-regioselectivity of carbonyl crotylation is a long-standing problem in the realm of C–C bond formation reactions. We demonstrate that zinc-mediated crotylation of aldehydes and ketones can afford α-linear homoallylic alcohols exclusively to provide a simple solution for this problem. In this context, we describe a method for the α-regioselective crotylation of aldehydes and ketones by using an easily available
羰基巴豆化的 α-区域选择性是 C-C 键形成反应领域的一个长期存在的问题。我们证明了锌介导的醛和酮的巴豆化可以专门提供 α-线性高烯丙醇,从而为该问题提供简单的解决方案。在这方面,我们描述了一种使用容易获得的起始材料(例如巴豆基溴、锌粉和毒性较小的溶剂 DMPU)对醛和酮进行 α-区域选择性巴豆化的方法。该反应底物范围广,效率高。此外,提出了金属-[3,5]-σ 重排以解释锌介导的巴豆化中的高α-区域选择性。