A novel sulfonyl radical triggered selective iodosulfonylation and bicyclization of 1,6-dienes has been described for the first time. High selectivity and efficiency, mild reaction conditions, excellent functional group compatibility, and broad substrate scope are the attractive features of this synthetic protocol, which provides a unique platform for precise radical cyclization.
An efficient, selective, and step economical radical cyclization of 1,6-dienes with alkyl nitriles initiated by α-C(sp3)–H functionalization under the Sc(OTf)3 and Ag2CO3 system is described here. The selective divergent cyclization relies on the substitution effect at the α-position of the acrylamide moiety and nitriles, which is terminated by hydrogen abstraction, direct cyclization with the aryl
本文描述了在 Sc(OTf) 3和 Ag 2 CO 3体系下由 α-C(sp 3 )-H 官能化引发的 1,6-二烯与烷基腈的高效、选择性和分步经济的自由基环化。选择性发散环化依赖于丙烯酰胺部分和腈的α-位的取代效应,其分别通过夺氢、与芳基环直接环化或与CN键进一步环化和水解来终止。