Ambient-Temperature Cobalt-Catalyzed Cycloaddition Strategies to Aromatic Boronic Esters
作者:Anne-Laure Auvinet、Joseph P. A. Harrity、Gerhard Hilt
DOI:10.1021/jo1004907
日期:2010.6.4
The room-temperature cobalt-catalyzed [4 + 2] cycloaddition of alkynylboronates and 1,3-dienes provides a convenient and general method for the synthesis of benzene-based aromatic boronic esters. Two complementary aromatization strategies involving in situ elimination and DDQ oxidation were explored, with the latter finding more generality. Finally, the potential of this technique to generate highly
室温钴催化的炔基硼酸酯和1,3-二烯的[4 + 2]环加成反应为合成苯基芳族硼酸酯提供了一种方便而通用的方法。探讨了涉及原位消除和DDQ氧化的两种互补的芳构化策略,后者发现了更多的通用性。最后,通过手性(外消旋)DMAP催化剂的合成已证明了该技术产生高度官能化的联芳基的潜力。