Co-Cluster-Based Metal-Organic Frameworks as Selective Catalysts for Benzene Tandem Acylation-Nazarov Cyclization to Benzocyclopentanone
作者:Mengjia Liu、Kuan Gao、Yanru Fan、Xiaoqing Guo、Jie Wu、Xiangru Meng、Hongwei Hou
DOI:10.1002/chem.201704749
日期:2018.1.26
challenging method for the synthesis of the benzocyclopentanone skeleton, which is key intermediate of many natural products. Herein, two metal‐cluster‐based metal–organic frameworks (MCOFs) (H3O)2[Co4(pbcd)2(μ3‐OH)2]⋅CH3CH2OH⋅4 H2O}n (1; pbcd=9,9′‐(propan‐1,3‐diyl)bis(9H‐carbazole‐3,6‐dicarboxylic acid) and [Co5.25(mcd)2(HCO2)(μ2‐O)0.5(μ3‐OH)0.5(H2O)4]⋅6 H2O⋅5 DMF}n (2; mcd=9,9′‐methylenebis(9H‐carbazole‐3
一步式选择性苯酰化-Nazarov环化是合成苯并环戊酮骨架的一种有吸引力但具有挑战性的方法,该骨架是许多天然产物的关键中间体。这里,双金属系簇的金属-有机骨架(MCOFs)(H 3 O)2 [CO 4(PBCD)2(μ 3 -OH)2 ] ⋅ CH 3 CH 2 OH ⋅ 4小时2 ö} Ñ(1 ; pbcd = 9,9'-(propan-1,3-diyl)bis(9 H-咔唑-3,6-didiacid acid)和[Co 5.25(mcd)2(HCO 2)(μ 2 -O)0.5(μ 3 -OH)0.5(H 2 O)4 ] ⋅ 6 H 2 ö ⋅ 5 DMF} Ñ(2 ; MCD = 9,9'-亚甲基双(9 ħ -咔唑-3- ,6-二羧酸)被开发来催化1,3-二甲氧基苯用α,β不饱和羧酸为环戊烯酮的合成的串联纳扎罗夫环化反应[ b ]苯。MCOFs 1和2,这是从四环钴构成II簇[CO