Allenyl Azide Cycloaddition Chemistry. Photochemical Initiation and CuI Mediation Leads to Improved Regioselectivity
作者:Ken S. Feldman、D. Keith Hester、Carlos Silva López、Olalla Nieto Faza
DOI:10.1021/ol800429j
日期:2008.4.1
Irradiation of 2-(3-alkenyl)allenylphenyl azides in the presence of excess Cul furnished functionalized 2,3-cyclopentenylindoles in good yield with only trace amounts of competitive C-N-bonded regioisomeric products. These results represent a significant departure from the modestto-nonexistent regioselectivity that attended thermal cyclization of these allenyl azide substrates.