Linear-Organic-Polymer-Supported Iridium Complex as a Recyclable Auto-Tandem Catalyst for the Synthesis of Quinazolinones via Selective Hydration/Acceptorless Dehydrogenative Coupling from <i>o</i>-Aminobenzonitriles
作者:Shushu Hao、Jiazhi Yang、Peng Liu、Jing Xu、Chenchen Yang、Feng Li
DOI:10.1021/acs.orglett.1c00475
日期:2021.4.2
coordinative immobilization of [Cp*IrCl2]2 on poly(4-vinylpyridine), was proven to be an efficient heterogeneous autotandem catalyst for synthesizing quinazolinones via selective hydration/acceptorless dehydrogenative coupling from o-aminobenzonitriles. Furthermore, the synthesized catalyst was recycled five times without an obvious decrease in the catalytic activity.
通过将[Cp * IrCl 2 ] 2配位固定在聚(4-乙烯基吡啶)上设计和合成的线性有机聚合物负载的铱络合物Cp * Ir @ P4VP被证明是一种有效的异质串联催化剂通过邻氨基苄腈的选择性水合/无受体脱氢偶联合成喹唑啉酮。此外,将合成的催化剂循环使用五次,而催化活性没有明显降低。
Copper-mediated synthesis of quinazolin-4(3<i>H</i>)-ones from <i>N</i>-(quinolin-8-yl)benzamide and amidine hydrochlorides
An efficient copper-mediated tandem C(sp2)–H amination to provide quinazolinones from N-(quinolin-8-yl)benzamide and amidine hydrochlorides has been developed. It can afford rather complex products in a single step synthesis from easily available starting materials using 8-aminoquinoline as a removable bidentate directing group. The features of this reaction are it being simple to operate and avoiding
Palladium-Catalyzed Carbonylative Reactions of 1-Bromo-2-fluorobenzenes with Various Nucleophiles: Effective Combination of Carbonylation and Nucleophilic Substitution
A systematic study on the carbonylative transformation of 1‐bromo‐2‐fluorobenzenes with various nucleophiles has been performed. Different types of double nucleophiles, such as NN, NC, OC, and NS, can be effectively applied as coupling partners. The corresponding six‐membered heterocycles were isolated in moderate to good yields.
Direct diversification of unmasked quinazolin-4(3H)-ones through orthogonal reactivity modulation
作者:Jae Bin Lee、Mi Eun Kang、Joohee Kim、Chang Young Lee、Jung-Min Kee、Kyungjae Myung、Jang-Ung Park、Sung You Hong
DOI:10.1039/c7cc05794f
日期:——
An orthogonal reactivity modulation strategy affords diverse synthetic analogues from unmasked quinazolin-4(3H)-ones.
一种正交反应调控策略使未掩蔽的喹唑啉-4(3H)-酮产生多样的合成类似物。
Synthesis of quinazolin-4(3H)-ones via electrochemical decarboxylative cyclization of α‑keto acids with 2-aminobenzamides
作者:Qing Tian、Jinli Zhang、Liang Xu、Yu Wei
DOI:10.1016/j.mcat.2020.111345
日期:2021.1
Abstract Herein, an environmentally benign electrochemical protocol has been disclosed for the synthesis of quinazolin-4(3H)-one derivatives from readily available α‑keto acids and 2-aminobenzamides. This decarboxylative cyclization process proceeds conveniently in the absence of any homogeneous metal catalysts, bases, or external oxidants. This protocol also features CO2 by-products, mild reaction
摘要 本文公开了一种环境友好的电化学方案,用于从容易获得的 α-酮酸和 2-氨基苯甲酰胺合成 quinazolin-4(3H)-one 衍生物。这种脱羧环化过程在没有任何均相金属催化剂、碱或外部氧化剂的情况下方便地进行。该协议还具有 CO2 副产物、温和的反应条件(室温和空气气氛)和广泛的底物范围,包括一系列 2,3-二取代喹唑啉酮产品。