A redox-neutral weak carbonyl chelation assisted C4–H allylation of indoles with vinylcyclopropanes†
Abstract
A weak acyl chelation-assisted distal C4–H allylation of indoles has been accomplished using vinylcyclopropanes as an allylating agent under redox-neutral ruthenium(II) catalysis. The regioselectivity, removable directing group, substrate scope and diastereoselectivity are the important practical features.