A General and Regioselective Synthesis of Cyclopentenone Derivatives through Nickel(0)-Mediated [3 + 2] Cyclization of Alkenyl Fischer Carbene Complexes and Internal Alkynes
作者:José Barluenga、Pablo Barrio、Lorena Riesgo、Luis. A. López、Miguel Tomás
DOI:10.1021/ja075106+
日期:2007.11.1
2-cyclopentenone derivatives 3-6 are synthesized by the nickel(0)-mediated [3 + 2] cyclizationreaction of chromium alkenyl(methoxy)carbenecomplexes1 and internal alkynes2. The reaction takes place with complete regioselectivity with both unactivated alkynes and activated alkynes (electron-withdrawing and electron-donating substituted alkynes). Representative cycloadducts containing boron and tin