Antifungal estrogen-like imidazoles. Synthesis and antifungal activities of thienyl and 1H-pyrrolyl derivatives of 1-aryl-2-(1H-imidazol-1-yl)ethane
摘要:
Reaction of arylacetyl chlorides on thiophene or pyrrole derivatives furnished 2-aryl-1-(2-thienyl)- or 2-aryl-1-(1H-pyrrol-2-yl)-1-ethanones. Reduction of ketones to the corresponding carbinols and reaction of the latter compounds with 1,1'-sulfonyl-diimidazole or 1,1'-carbonyldiimidazole gave 2-thienyl- and 1H-pyrrol-2-yl-1-aryl-2-(1H-imidazol-1-yl)ethanes, respectively. The new compounds were tested in vitro against a variety of pathogenic fungi in comparison with miconazole and bifonazole. Some 5-chloro-2-thienyl derivatives were endowed with good antifungal activity, particularly against Candida albicans and Cryptococcus neoformans.
CuI /反-4-羟基-1-脯氨酸催化的芳基碘化物与叔丁基β-酮酯的偶联在DMF中在40°C下顺利进行,在酸促进叔丁酯的脱保护和脱羧反应后得到α-芳基酮团体。CuI / 2-吡啶甲酸在二恶烷中于70°C催化芳基碘化物与乙酰乙酸叔丁酯偶合时,在自发脱酰作用下释放出α-芳酸叔丁酯。各种各样的官能团,例如乙酰基,甲氧基,腈,硝基,溴和氯与反应条件相容。
Visible-Light-Mediated α-Arylation of Enol Acetates Using Aryl Diazonium Salts
作者:Thea Hering、Durga Prasad Hari、Burkhard König
DOI:10.1021/jo301984p
日期:2012.11.16
light mediates efficiently the α-arylation of enol acetates by aryl diazonium salts under mild conditions using [Ru(bpy)3]Cl2 as a photoredox catalyst. The broad scope of the reaction toward various diazonium salts and enol acetates was explored. The application of this reaction in the concise synthesis of 2-substituted indoles was demonstrated
Salicylic Acid‐Catalyzed Arylation of Enol Acetates with Anilines
作者:Diego Felipe‐Blanco、Jose C. Gonzalez‐Gomez
DOI:10.1002/adsc.201800427
日期:2018.7.16
α‐Arylketones are both structure moieties commonly found in bioactive compounds and versatile synthetic intermediates for the preparation of drug‐like molecules. An operationally simple and scalable protocol has been developed to prepare α‐arylketonesfrom readily available aromatic amines and enolacetates (or silyl enol ethers). This metal‐free methodology features the use of salicylic acid as
materials. This N-heterocyclic carbene catalysis method adopts an atroposelective annulation of 2-aryketones with ynals under oxidative conditions. The annulation includes the construction of one or two axes in a single operation, achieves step economy, and affords axially chiral triaryl-2-pyrones in moderate to good yields, with high to excellent enantioselectivities. DFT calculations of the relative energies