A removable functional group strategy for regiodivergent Wittig rearrangement products
作者:Md Nirshad Alam、Lakshmi K. M.、Pradip Maity
DOI:10.1039/c8ob02221f
日期:——
[1,2] and [2,3] Wittig rearrangements are competing reaction pathways, often leading to uncontrollable product distribution. We employ a single removable functional group to fulfill the dual role of attaining a reversible [2,3] and stabilizing radical intermediate for the [1,2] path to obtain both the Wittig products selectively for a broad range of substrates.
A Ni-catalyzed 1,2-acyl migration triggered by C–C bond cleavage was developed. The process of 1,2-acyl migration followed by olefin isomerization provides a convenient access to α,β-unsaturatedketones, which are well-known building blocks in organic synthesis. Experimental and computational studies show that the selective β-hydride elimination and Ni-hydride reinsertion play an essential role in