Selective Cleavage of Inert Aryl C–N Bonds in <i>N</i>-Aryl Amides
作者:Zhiguo Zhang、Dan Zheng、Yameng Wan、Guisheng Zhang、Jingjing Bi、Qingfeng Liu、Tongxin Liu、Lei Shi
DOI:10.1021/acs.joc.7b02880
日期:2018.2.2
A highly selective, IBX-promoted reaction has been developed for the oxidative cleavage of inertC(aryl)–N bonds on secondary amides while leaving the C(carbonyl)–N bond unchanged. This metal-free reaction proceeds under mild conditions (HFIP/H2O, 25 °C), providing facile access to various useful primary amides, some of which would be otherwise unattainable using conventional aminolysis and hydrolysis
已经开发出一种高度选择性的IBX促进的反应,用于氧化裂解仲酰胺上的惰性C(芳基)-N键,同时保持C(羰基)-N键不变。这种无金属的反应在温和的条件下(HFIP / H 2 O,25°C)进行,可以轻松获得各种有用的伯酰胺,而使用常规的氨解和水解方法则无法实现其中的某些。
Cooperative Heterogeneous Organocatalysis and Homogeneous Metal Catalysis for the One-Pot Regioselective Synthesis of 2-Pyridones
A direct, one-pot and regioselective access to N-alkyl- and N-aryl-substituted 2-pyridones is described from readily available β-keto amides and either primary or secondary propargylic alcohols. This approach involves the combination of two different cooperativehomogeneous and heterogeneous catalytic systems based on a transition metal oxide and a supported organocatalyst, respectively.
Palladiumcatalysed addition of arylboronic acid to the readily available 2-cyano-(N-aryl)-acetamide or ethyl-2-cyanoacetate followed by subsequent reaction transform them into the biologically significant 4-arylquinolin-2-one or pyrazolone derivatives. The reaction conditions are robust enough to prevent the hydrolysis of ester/amide moiety during arylation. In addition, the unactivated nitrile moiety
An Efficient Friedlander Condensation Using Sodium Fluoride as Catalyst in the Solid State
作者:K. Mogilaiah、Ch. Srinivas Reddy
DOI:10.1081/scc-120023427
日期:2003.9
Abstract Sodium fluoride catalyzed Friedlander condensation of 2-aminonicotinaldehye with various carbonyl compounds containing α-methylene group in the solid state furnished corresponding 1,8-naphthyridines. The reaction proceeds efficiently at room temperature in high yields and in a state of excellent purity.
Oxidation of β-Ketoamides: The Synthesis of Vicinal Tricarbonyl Amides
作者:Yueyang Liu、Zhiguo Zhang、Yameng Wan、Guisheng Zhang、Zhonglian Li、Jingjing Bi、Nana Ma、Tongxin Liu、Qingfeng Liu
DOI:10.1021/acs.joc.6b03062
日期:2017.4.7
A facile and direct oxidative reaction for the synthesis of vicinaltricarbonyl amides in moderate to excellent yields (53–88%) was developed starting from readily available β-ketoamides in the presence of phenyliodine(III) bis(trifluoroacetate). The resulting products possess significant synthetic potential, making this approach a valuable addition to the group of traditional methods already available