Synthesis of Allenes via Palladium-Catalyzed Hydrogen-Transfer Reactions: Propargylic Amines as an Allenyl Anion Equivalent
作者:Hiroyuki Nakamura、Takaya Kamakura、Makoto Ishikura、Jean- François Biellmann
DOI:10.1021/ja039175+
日期:2004.5.1
Synthesis of allenes has been achieved by using palladium-catalyzed hydrogen-transfer reactions. Various propargylic amines, which were readily prepapred from iodobenzenes and propargylic amines by Sonogashira coupling reaction, underwent the hydrogen-transfer reaction in the presence of Pd2dba3.CHCl3/(C6F5)3P catalyst at 100 degrees C in dioxane for 24 h, giving the corresponding allenes in 43-99%
已通过使用钯催化的氢转移反应实现了丙二烯的合成。通过 Sonogashira 偶联反应由碘苯和炔丙胺很容易制备的各种炔丙胺,在 Pd2dba3.CHCl3/(C6F5)3P 催化剂存在下,在 100 摄氏度的二恶烷中进行 24 小时的氢转移反应,得到相应丙二烯的产率为 43-99%。通过将 N,N-二异丙基丙-2-炔胺的乙炔锂加成到醛和酮上合成的各种含有炔丙基氨基甲基的炔醇也在 Pd2dba3.CHCl3 催化剂和 (C6F5 )3P 在 80 摄氏度的二恶烷中,以 56-92% 的产率得到相应的丙二烯。在当前的转型中,