Photoredox-Catalysed Decarboxylative Alkylation of N-Heteroarenes with <i>N</i>
-(Acyloxy)phthalimides
作者:Wan-Min Cheng、Rui Shang、Ming-Chen Fu、Yao Fu
DOI:10.1002/chem.201605640
日期:2017.2.21
catalyst in combination with either a stoichiometric amount of Brønsted acid or a catalytic amount of Lewis acid is capable of catalyzingregioselective alkylation of N‐heteroarenes with N‐(acyloxy)phthalimides at room temperature under irradiation. A broad range of N‐heteroarenes can be alkylated using a variety of secondary, tertiary, and quaternary carboxylates. Mechanistic studies suggest that an IrII/IrIII
铱光氧化还原催化剂与化学计量的布朗斯台德酸或催化量的路易斯酸结合使用,能够在室温下于辐射下催化N-(酰氧基)邻苯二甲酰亚胺对N-杂芳烃的区域选择性烷基化。可以使用各种仲,叔和季羧酸盐将多种N-杂芳烃烷基化。机理研究表明,Ir II / Ir III氧化还原催化循环是所观察到的反应性的原因。
Organocatalyzed, Visible-Light Photoredox-Mediated, One-Pot Minisci Reaction Using Carboxylic Acids via <i>N</i>-(Acyloxy)phthalimides
作者:Trevor C. Sherwood、Ning Li、Aliza N. Yazdani、T. G. Murali Dhar
DOI:10.1021/acs.joc.8b00205
日期:2018.3.2
one-pot Minisci reaction has been developed using visible light, an organic photocatalyst, and carboxylic acids as radical precursors via the intermediacy of in situ-generated N-(acyloxy)phthalimides. The conditions employed are mild, demonstrate a high degree of functional group tolerance, and do not require a large excess of the carboxylic acid reactant. As a result, this reaction can be applied to
The direct visible light-mediated C–Halkylation of heteroarenes using aliphatic carboxylic acids is reported. This mild method proceeds at low catalyst loadings (0.5 mol %) and has a high functional group tolerance and a broad substrate scope. Notably, functionalization of (iso)quinoline, pyridine, phthalazine, benzothiazole, and other heterocyclic derivatives with both cyclic and acyclic primary
Introduction of Heteroaromatic Bases onto Cycloalkanes with BPO
作者:Luan Zhou、Hideo Togo
DOI:10.1002/ejoc.201801797
日期:2019.2.21
Treatment of heteroaromatics with BPO and CF3CO2H in cycloalkanes at 100 °C for 4 h generated C–C bonded heteroaromaticbases bearing cycloaklyl group in good yields under transition‐metal‐free conditions.
在环烷烃中,用BPO和CF 3 CO 2 H在100°C下处理杂芳族化合物4小时,在无过渡金属的条件下,生成的具有C-C键合的带有环烯丙基的杂芳族碱的收率很高。
Molecular Oxygen-Mediated Minisci-Type Radical Alkylation of Heteroarenes with Boronic Acids
作者:Lizhi Zhang、Zhong-Quan Liu
DOI:10.1021/acs.orglett.7b03297
日期:2017.12.15
The carbon–carbonbondformation via autoxidation of organoboronic acid using 1 atm of O2 is achieved in a simple, clean, and green fashion. The approach allows a technically facile and environmentally benign access to structurally diverse heteroaromatics with medicinally privileged scaffolds. The strategy also displays its practicality and sustainability in the resynthesis of marketed drugs Crestor