Rhodium-Catalyzed Chemo-, Regio-, and Enantioselective [2 + 2 + 2] Cycloaddition of Alkynes with Isocyanates
作者:Ken Tanaka、Azusa Wada、Keiichi Noguchi
DOI:10.1021/ol052041b
日期:2005.10.1
chemoselective [2 + 2 + 2] cycloaddition of alkynes with isocyanates leading to a wide range of 2-pyridones. This method was successfully applied to the chemo-, regio-, and enantioselective synthesis of axially chiral 2-pyridones from unsymmetrical alpha,omega-diynes, bearing an ortho-substituted phenyl at one terminal position, and alkyl isocyanates.
[反应:见正文]我们已经开发出阳离子铑(I)/修饰的BINAP络合物催化的炔烃与异氰酸酯的化学选择性[2 + 2 + 2]环加成反应,从而制得各种2-吡啶酮。该方法已成功地用于由不对称的α,ω-二炔,在一个末端带有邻位取代的苯基和异氰酸烷基酯的轴向手性2-吡啶酮的化学,区域和对映选择性合成。