A palladium-catalyzed enantioselective Heck cyclization/dearomatization cascade via capturing the cyclized Heck π-allylpalladium intermediate by β-naphthols is reported, which provides a new strategy for the construction of chiral indole–terpenoid frameworks. This method affords indole-functionalized β-naphthalenone compounds bearing an all-carbon-substituted quaternary chiral center in excellent yields
Regiodivergent cascade cyclization/alkoxylation of allenamides <i>via</i> N-protecting group driven rearrangement to access indole and indoline derivatives
作者:Dhananjay Chaudhary、Suman Yadav、Naveen Kumar Maurya、Dharmendra Kumar、Km Ishu、Malleswara Rao Kuram
DOI:10.1039/d2cc03174d
日期:——
tethered allenamides is described, providing regiodivergent indole and indoline derivatives controlled by the N-protecting group. This room temperature reaction provided a functionalizable olefinic moiety with broad substrate scope. Preliminary mechanistic studies support the rearrangement of an indoline-derived intermediate to indoles with the N-acetyl allenamides forming free (NH) indoles.