Palladium-catalyzed synthesis of terminal acetalsvia highly selective anti-Markovnikov nucleophilic attack of pinacol on vinylarenes, allyl ethers, and 1,5-dienes
A palladium-catalyzed reaction of vinylarenes, allyl ethers, and 1,5-dienes with pinacol proceeded via a selective anti-Markovnikov nucleophilic attack to afford corresponding terminal acetals as major products. The bulkiness of pinacol was found to be critical in controlling the regioselectivity.
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