一系列的2-(咪唑-2-基)苯酚配位体L1 - L6与一般组合物4-R 4 -5-R 3 -6-R 2 -2-(4,5--R 1,R 1 - 1H -咪唑-2-基)苯酚(L1:R 1 = C 2 H 5,R 2 = R 3 = R 4 = H; L2:R 1 = C 6 H 5,R 2 = R 3 = R 4 = H ; L3:R 1 = C6 H 5,R 3= OCH 3,R 2= R 4= H;L4:R 1= C 6 H 5,R 4= OCH 3,R 2= R 3= H;L5:R 1= C 6 H 5,R 3= H,R 2= R 4= CH 3;L6:R 1= C 6 H 5,R 3= H,R 2= R 4=t- Bu)和L7(2,4-二叔丁基-6-(1H-菲[9,10-d]咪唑-2-基)苯酚)及其中性Zn(II)配合物(Z1 - Z7)被合成并通过光谱和元素分析表征。通过单晶X射线衍
Cascade CN and CO bond constructions for the synthesis of dibenzoimidazo[1,4]oxazepines catalyzed by CuI/
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作者:Zhuo‐Huan Li、Tuan‐Jie Li、Jian‐Quan Liu、Xiang‐Shan Wang
DOI:10.1002/jhet.3831
日期:2020.2
novel method for the synthesis of dibenzo[b,f]imidazo[1,2‐d][1,4]oxazepine derivatives was described via cascade Csp2N and Csp2O bond constructions. It was a crossed double Ullmann reactions using 4,5‐diaryl‐2‐(2‐hydroxylphenyl)‐1H‐imidazole as the double nucleophilic centers in the presence of Cs2CO3, while 1‐bromo‐2‐iodobenzene was used as a substrate catalyzed by CuI and o‐phenanthroline in good
对于二苯并[合成的新方法b,˚F ]咪唑并[1,2 d ] [1,4]氧氮杂衍生物经由级联CSP描述2 N和CSP 2 O键构造。在Cs 2 CO 3的存在下,使用4,5-二芳基-2-(2-羟基苯基)-1 H-咪唑作为双亲核中心,这是一个交叉的双重Ullmann反应,而使用了1-溴-2-碘苯CuI和邻菲咯啉催化的底物收率高。