On-Water Cp*Ir(III)-Catalyzed C–H Functionalization for the Synthesis of Chromones through Annulation of Salicylaldehydes with Diazo-Ketones
作者:Suvankar Debbarma、Md Raja Sk、Biswabrata Modak、Modhu Sudan Maji
DOI:10.1021/acs.joc.9b00418
日期:2019.5.17
A high-valent Ir(III)-catalyzed C–H bond functionalization is carried out for the first time on water for the synthesis of a biologically relevant chromone moiety. The C–H activation and annulation of salicylaldehydes with diazo-compounds provided the desired chromones. The synthesis of C3-substitution-free chromones has also been demonstrated by a one-pot decarboxylation by employing tert-butyl diazoester
首次在水上进行高价Ir(III)催化的C–H键官能化,以合成生物学相关的色酮部分。水杨醛与重氮化合物的CH活化和环化提供了所需的色酮。通过使用叔丁基重氮酯进行一锅脱羧也证明了不含C 3取代的色酮的合成。产物色酮的C3和C5 C–H活化也可在不同条件下进行,以进一步多样化。