Chemoselective hydrogenation method catalyzed by Pd/C using diphenylsulfide as a reasonable catalyst poison
作者:Akinori Mori、Tomoteru Mizusaki、Yumi Miyakawa、Eri Ohashi、Tomoko Haga、Tomohiro Maegawa、Yasunari Monguchi、Hironao Sajiki
DOI:10.1016/j.tet.2006.09.094
日期:2006.12
using Pd/C, we investigated catalyst poison as a controller of the catalyst activity. We found that the addition of Ph2S (diphenylsulfide) to the Pd/C-catalyzed hydrogenation reaction mixture led to reasonable deactivation of Pd/C. By the use of the Pd/C–Ph2S catalytic system, olefins, acetylenes, and azides can be selectively reduced in the coexistence of aromatic carbonyls, aromatic halides, cyano
尽管Pd / C是最有用的加氢催化剂之一,但Pd / C的高催化剂活性导致难以将其应用于不同类型的可还原官能团之间的化学选择性加氢。为了实现使用Pd / C进行化学选择性加氢,我们研究了催化剂毒物作为催化剂活性的控制剂。我们发现,向Pd / C催化的氢化反应混合物中添加Ph 2 S(二苯硫醚)可导致Pd / C合理失活。通过使用Pd / C–Ph 2 S催化体系,烯烃,乙炔和叠氮化物可以选择性地还原成芳族羰基,芳族卤化物,氰基,苄基酯和N-Cbz(苄氧羰基)保护基。本方法有望作为合成有机化学中通用和实用的化学选择性加氢方法。