Photosensitized electron-transfer reactions of phenylacetylene
作者:Susan L. Mattes、Samir Farid
DOI:10.1039/c39800000126
日期:——
Phenylacetylene (A) reacts with excited sensitizers (S) to produce radical ions (S)·–, (A)·+, which react as geminate or separated pairs with (A) to give a dimeric radical cation (A+–·A); the latter reacts with nitriles to give pyridines (1) or with nitromethane leading to an oxidation product (2) and a dimer (1-phenylnaphthalene) is also formed via the geminate pair.
Carbon Atom Insertion into Pyrroles and Indoles Promoted by Chlorodiazirines
作者:Balu D. Dherange、Patrick Q. Kelly、Jordan P. Liles、Matthew S. Sigman、Mark D. Levin
DOI:10.1021/jacs.1c06287
日期:2021.8.4
calculations supporting a selectivity-determining cyclopropanation step. Computations surprisingly indicate that the stereochemistry of cyclopropanation is of little consequence to the subsequent electrocyclicringopening that forges the pyridine core, due to a compensatory homoaromatic stabilization that counterbalances orbital-controlled torquoselectivity effects. The utility of this skeletal transform is