3-Aroylindoles have been prepared via copper-catalyzed cyclization of N-(2-iodoaryl)enaminones, readily available from 2-iodoanilines and α,β-ynones. The reaction tolerates a variety of useful functionalities including ether, keto, cyano, bromo, and chloro substituents. This indole synthesis can also be carried out from 2-iodoanilines and α,β-ynones through a sequential process that omits the isolation of enaminone intermediates.
The hydrogen-bond as a configurational lock in the photocyclisation of dibenzoylmethane o-halogenoanils: wavelength dependence of this reaction
作者:James Grimshaw、A. Prasanna de Silva
DOI:10.1039/c39800000301
日期:——
The tautomers (1, XCl, Br, or I) of anils photocyclise to the phenanthridine derivative (2) with varying efficiencies depending on the halogen and the solvent; owing to the low energies of the first excited states the quantum yields vary with irradiation wavelength.