Catalytic Migratory Oxidative Coupling of Nitrones
作者:Shogo Hashizume、Kounosuke Oisaki、Motomu Kanai
DOI:10.1021/ol201629n
日期:2011.8.19
bond-formation proceeds through cleavage of two C(sp3)–H bonds concomitant with C═N double bond-migration. The reaction provides an alternating nitrone moiety, allowing for further synthetically useful transformations. Radical clock studies suggest that the nucleophilicaddition of nitrones to an oxidatively generated carbocation is a key step.
Catalytic migratory oxidative coupling of nitrones through an outer-sphere C(<i>sp<sup>3</sup></i>)-H activation process
作者:Shogo Hashizume、Kounosuke Oisaki、Motomu Kanai
DOI:10.1002/tcr.201100024
日期:2011.9.29
efficient C‐Hactivation, which has attracted increased interest in organic chemistry. In this account, we describe a CuI‐catalyzed oxidative coupling between nitrones and various ethers or amines as an example. Predictable site‐selective C‐C bond formation was achieved throughactivation of the C‐H bonds in each coupling partner and the migration of a C‐N double bond. Mechanisticstudies strongly suggested