Synthesis of Aliphatic Hydroxyaryl Ketones or (Hetero)aryl Hydroxyaryl Ketones by Acylation of Organometallic Reagents
作者:Alan Katritzky、Khanh Le、Prabhu Mohapatra
DOI:10.1055/s-2007-990786
日期:2007.10
Diverse hydroxyarenecarboxylic acids afford stable N-(hydroxyaroyl)benzotriazoles that react with heteroaryl, alkyl, and aryl Grignard or lithium reagents to give the corresponding hydroxyaryl ketones in 51-94% yields.
Eco-friendly organocatalyst- and reagent-controlled selective construction of diverse and multifunctionalized 2-hydroxybenzophenone frameworks for potent UV-A/B filters by cascade benzannulation
作者:Muhammad Saeed Akhtar、Raju S. Thombal、Ramuel John Inductivo Tamargo、Won-Guen Yang、Sung Hong Kim、Yong Rok Lee
DOI:10.1039/d0gc01011a
日期:——
2-hydroxy-3′-formylbenzophenones and [4 + 2] cycloaddition for 2-hydroxybenzophenones. With this methodology, an unprecedented double benzannulation allows one-pot construction of diverse 7-(2′-hydroxybenzoyl)-2-naphthaldehydes via [3 + 3 + 4] cycloaddition. This protocol features a broad substrate scope, high functional-group tolerance, and operational simplicity in an environmentally benign green solvent
Leveraging Nonstrained C–C Bonds for Selective Carboacylation of an Unactivated Alkyne via Transient Dearomatization
作者:Jiamin He、Tongxiang Cao、Kai Chen、Shifa Zhu
DOI:10.1021/acs.orglett.4c00608
日期:2024.4.5
Carboacylation of an unsaturated bond represents a powerful transformation. However, only a few examples of carboacylation of alkyne have been reported through C–C bond scission and reconnection. Here, we report a method of carboacylation of an unactivated alkyne by utilizing nonstrained C–C bonds under gold(I) catalysis. The density functional theory computational and experimental studies reveal that
不饱和键的碳酰化代表了强大的转变。然而,仅报道了少数通过C-C键断裂和重新连接进行炔烃碳酰化的例子。在这里,我们报道了一种在金(I)催化下利用非张力 C-C 键对未活化的炔烃进行碳酰化的方法。密度泛函理论计算和实验研究表明,该反应通过溶剂笼嵌套酰基阳离子从 C 到 C 的形式 1,3-酰基迁移进行。