作者:Bernhard J. Gregori、Michal Nowakowski、Anke Schoch、Simon Pöllath、Josef Zweck、Matthias Bauer、Axel Jacobi von Wangelin
DOI:10.1002/cctc.202000994
日期:2020.11.5
very little applications as hydrogenation catalysts. Here, we report a Cr‐catalyzed semi‐hydrogenation of internal alkynes to the corresponding Z‐alkenes with good stereocontrol (up to 99/1 for dialkyl alkynes). The catalyst comprises the commercial reagents chromium(III) acetylacetonate, Cr(acac)3, and diisobutylaluminium hydride, DIBAL−H, in THF. The semi‐hydrogenation operates at mild conditions
铬配合物很少用作氢化催化剂。在这里,我们报告了内部炔烃的Cr催化半氢化反应成具有良好立体控制(二烷基炔烃高达99/1)的相应Z烯烃。该催化剂在THF中包含商业试剂乙酰丙酮铬(III)Cr(acac)3和氢化二异丁基氢化铝DIBAL-H。半氢化在温和条件下(1-5巴ħ操作2,30℃)。