Cobalt‐Catalyzed Chemoselective Transfer Hydrogenation of C=C and C=O Bonds with Alkanols
作者:Biao‐Lin Jiang、Shuang‐Shuang Ma、Meng‐Liang Wang、Dian‐Sheng Liu、Bao‐Hua Xu、Suo‐Jiang Zhang
DOI:10.1002/cctc.201900010
日期:2019.3.20
this study, wherein the cobalt‐ bidentate phosphine catalyst precursor is commercially available and the active low‐valent Co species could be generated in‐situ. For the conjugation enones, the vinyl group is selectively reduced, whereas with nonconjugated alkenones, the selectivity is changed to the carbonyl group. Besides, ortho‐alkenyl‐benzaldehydes/imines are well tolerated, and the reduction solely
这项研究开发了一种环境友好的方案,在无碱条件下用链烷醇对C = C和C = O键进行化学选择性转移加氢,其中钴二齿膦膦催化剂前体是可商购的,而活性低价Co物种可以原位生成。对于共轭烯酮,乙烯基被选择性地还原,而对于非共轭烯酮,选择性被改变为羰基。此外,邻链烯基苯甲醛/亚胺具有很好的耐受性,并且该方案仅在C = O / C = N位发生还原。