Tandem free-radical addition/substitution chemistry and its application to the preparation of novel AT<sub>1</sub>receptor antagonists
作者:Maree K. Staples、Rebecca L. Grange、James A. Angus、James Ziogas、Nichole P. H. Tan、Michelle K. Taylor、Carl H. Schiesser
DOI:10.1039/c0ob00573h
日期:——
tested for AT1 receptor antagonist properties. While the sulfur-containing systems were prepared following existing methodology, the selenium-containing analogues required the development of novel, tandem free-radical chemistry involving addition of aryl radicals to alkynes, followed by intramolecular homolyticsubstitution at the higher heteroatom. All four compounds prepared proved to be excellent
An ionic cascade insertion/cyclization reaction of thia-/selena-functionalized arylisocyanides has been successfully developed for the efficient and practical synthesis of 2-halobenzothiazole/benzoselenazole derivatives. This synthetic protocol, incorporating a halogen atom when forming the five-membered ring of benzothia/selenazoles, is different from the existing ones, where halogenation of the preformed