Synthesis of novel fused azaheterocycles by photostimulated intramolecular SRN1 reactions with nitrogen nucleophiles
作者:Victoria A. Vaillard、María E. Budén、Sandra E. Martín、Roberto A. Rossi
DOI:10.1016/j.tetlet.2009.04.042
日期:2009.7
The synthesis of pyrrole, indole, and pyrazole fused azaheterocycles is presented. The anions of carboxamides (6 and 12) and pyrazolylamines (15a–b) react under photostimulation by an intramolecular SRN1 process to yield fused azaheterocycles with good to excellent yields. We report on an efficient two-step synthesis of new fused azaheterocycles derived from pyrrole, indole, and pyrazole, as well as
Photochemical and photophysical behavior of indolyl anions in photostimulated intramolecular arylation reactions
作者:Victoria A. Vaillard、Roberto A. Rossi、Juan E. Argüello
DOI:10.1039/c2ob26698a
日期:——
carboxamides are irradiated in a basic medium. On the basis of photochemical and photophysical experiments, we propose that 2-indolylbenzoxazole is formed by intramolecularelectrontransfer followed by fast dehalogenation of the halophenyl radicalanion pendant moiety, finally a radical–radical collapse renders the observed product.