Oxycyanation of Vinyl Ethers with 2,2,6,6-Tetramethyl-N-oxopiperidinium Enabled by Electron Donor-Acceptor Complex.

An efficient and mild oxycyanation of vinyl ethers with 2,2,6,6-tetramethyl-N-oxopiperidinium and TMSCN is described. The mechanistic studies indicated that the formation of an electron donor-acceptor complex and subsequent single-electron-transfer process could be involved in the reaction.