A New Ruthenium-Catalyzed Hydrogen-Transfer Reaction: Transformation of 3-Benzyl But-1-ynyl Ethers into 1,3-Dienes and Benzaldehyde
作者:Kuo-Liang Yeh、Bo Liu、Ching-Yu Lo、Heh-Lung Huang、Rai-Shung Liu
DOI:10.1021/ja012623y
日期:2002.6.1
We report a ruthenium-catalyzed reaction for various 3-benzyl but-1-ynyl ethers with suitable functionalities. Treatment of these substrates with TpRu(PPh3)(CH3CN)2PF6 (8.0 mol %) catalyst in 1,2-dichloroethane (80 degrees C, 12 h) afforded functionalized 1,3-dienes and benzyl aldehyde in good yields. This process is considered to be a tandem dealkoxylation and transfer hydrogenation. Deuterium-labeling
我们报告了具有合适官能度的各种 3-苄基丁-1-炔基醚的钌催化反应。用 TpRu(PPh3)(CH3CN)2PF6 (8.0 mol%) 催化剂在 1,2-二氯乙烷(80 摄氏度,12 小时)中处理这些底物,可以得到功能化的 1,3-二烯和苯甲醛,收率良好。该过程被认为是串联脱烷氧基化和转移氢化。氘标记实验表明,不同氢原子的迁移具有区域特异性。根据同位素实验结果提出了一个合理的机制。