Regioselective Preparation of Benzo[<i>b</i>]furans from Phenols and α<i>-</i>Bromoketones
作者:Leire Arias、Yosu Vara、Fernando P. Cossío
DOI:10.1021/jo201841y
日期:2012.1.6
In this paper, a fully regiocontrolled synthesis of either 2- and 3-substituted benzo[b]furans is described. Direct reaction between phenols and α-bromoacetophenones in the presence of neutral alumina yields 2-substitutedbenzo[b]furans with complete regiocontrol. When a basic salt such as potassium carbonate is used, the corresponding 2-oxoether is obtained. Cyclization of these latter compounds promoted
在本文中,描述了2-和3-取代的苯并[ b ]呋喃的完全区域控制的合成。在中性氧化铝存在下,苯酚与α-溴乙酰苯之间的直接反应生成具有完全区域控制能力的2取代的苯并[ b ]呋喃。当使用碱性盐如碳酸钾时,获得了相应的2-氧代醚。由中性氧化铝促进的这些后面化合物的环化产生相应的3-取代的苯并[ b ]呋喃。使用前一种方法,可以在两个制备步骤中从商业来源获得Moracin M和其他类似物。DFT计算提供了合理的反应路径,以了解2-取代的苯并[ b ]呋喃的形成。
One-Pot, Three-Component Approach to Diarylmethylphosphonates: A Direct Entry to Polycyclic Aromatic Systems
作者:Sure Siva Prasad、Dileep Kumar Singh、Ikyon Kim
DOI:10.1021/acs.joc.9b00668
日期:2019.5.17
A newtype of three-component reaction was developed consisting of aldehydes, electron-rich (hetero)arenes, and trialkylphosphite, which provided facile access to a wide range of diarylmethylphosphonates under mild reaction conditions. Simple one- or two-step synthetic manipulation of the resulting compounds enabled us to reach several polycyclic (hetero)aromatic systems efficiently.
Expanding the chemical space: Discovery of new anticancer
<scp>3‐arylbenzofuran</scp>
derivatives
作者:Jinhwang Kim、Hyeon‐Min Cha、Mikyung Park、Dileep K. Singh、Gi H. Bae、Seong H. Kim、Ikyon Kim
DOI:10.1002/jhet.4043
日期:——
amines and triethyl phosphite to give a wide variety of aminomethylphosphonates. Furthermore, several benzo[d]oxazoles and pyrrolo[1,2‐a]quinoxalines were prepared by using the formyl group. Biological screening of the synthesized compounds revealed that the benzofuran bearing a pyrrolo[1,2‐a]quinoxaline moiety (5b) most potently inhibited the viability of human blood cancer cells, but not solid tumor
通过3-芳基苯并呋喃的C 2-官能化产生了一个新的化学空间。3-芳基苯并呋喃与仲胺和甲醛的曼尼希反应可将氨基甲基单元安装在苯并呋喃的C 2位。由Vilsmeier-Haack的3-芳基苯并呋喃甲酰化作用在C 2位引入的甲酰基被用作三组分Kabachnik-Fields与各种胺和亚磷酸三乙酯反应的反应伙伴,从而得到各种氨基甲基膦酸酯。此外,几种苯并[ d ]恶唑和吡咯并[1,2- a通过使用甲酰基制备]喹喔啉。对合成化合物的生物学筛选显示,带有吡咯并[1,2- a ]喹喔啉部分(5b)的苯并呋喃最能抑制人类血液癌细胞的活力,但不能抑制实体瘤细胞的活力。Caspase活性测定,膜联蛋白V阳性细胞分析和蛋白质印迹分析表明,5b诱导的人淋巴瘤U937细胞死亡可能是由于其具有通过抑制ERK激活来诱导血癌细胞caspase依赖性凋亡而导致的。
BCl3-promoted synthesis of benzofurans
作者:Ikyon Kim、Sei-Hee Lee、Sunkyung Lee
DOI:10.1016/j.tetlet.2008.09.034
日期:2008.11
Lewis acidic nature of boron trichloride (BCl3) to coordinate to the carbonyl functionality was exploited for the synthesis of benzofurans via dehydrative cyclization. This mild and efficient procedure allowed for facile access to a number Of highly Substituted benzofurans in a regioselective manner. The Structural requirement for the successful cyclodehydration was examined in the cases, where competitive demethylation could occur. (C) 2008 Elsevier Ltd. All rights reserved.