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。
Quinazolinones from <i>o</i>
-Aminobenzonitriles by One-Pot Sequential Selective Hydration/Condensation/Acceptorless Dehydrogenation Catalyzed by an Iridium Complex
作者:Wei Zhao、Pengcheng Liu、Feng Li
DOI:10.1002/cctc.201501385
日期:2016.4.20
A new strategy for the direct synthesis of quinazolinones from o‐aminobenzonitriles was proposed and accomplished. In the presence of [Cp*IrCl2]2 (Cp*=pentamethylcyclopentadienyl), a variety of desirable products was obtained easily through the one‐pot sequential selective hydration/condensation/acceptorless dehydrogenation. This protocol is highly attractive because it uses readily available starting
Divergent Synthesis of Quinazolin-4(3<i>H</i>)-ones and Tryptanthrins Enabled by a <i>tert</i>-Butyl Hydroperoxide/K<sub>3</sub>PO<sub>4</sub>-Promoted Oxidative Cyclization of Isatins at Room Temperature
hydroperoxide/K3PO4-promoted oxidative cyclization has been developed for the facile synthesis of various functionalized quinazolin-4(3H)-ones from commercially available isatins and amidine hydrochlorides at room temperature. The synthetic utility of this strategy was illustrated by the convenientsynthesis of tryptanthrin derivatives via a self-dimerization of isatins under the same conditions.
已经开发了一种协同作用的叔丁基过氧化氢/ K 3 PO 4促进的氧化环化反应,用于在室温下容易地从市售的靛红和盐酸am合成各种功能化的喹唑啉-4(3 H)-。该策略的合成效用通过在相同条件下通过靛红素的自二聚而方便地合成色胺酮衍生物来说明。
Exceedingly Fast, Direct Access to Dihydroisoquinolino[1,2-<i>b</i>]quinazolinones through a Ruthenium(II)-Catalyzed Redox-Neutral C–H Allylation/Hydroamination Cascade
作者:Gurupada Bairy、Suvankar Das、Hasina Mamataj Begam、Ranjan Jana
DOI:10.1021/acs.orglett.8b03048
日期:2018.11.16
A ruthenium(II)-catalyzed redox-neutral synthesis of dihydroisoquinoline-fused quinazolinone derivatives has been accomplished through the merger of C–Hactivation and alkene difunctionalization using quinazolinone as an inherent directing group. This intermolecular reaction proceeds rapidly and is complete within 10 min, providing the annulation product in high yields without any stoichiometric metal
钌(II)催化的二氢异喹啉稠合的喹唑啉酮衍生物的氧化还原中性合成是通过使用喹唑啉酮作为固有引导基团的CH活化和烯烃双官能团的合并完成的。该分子间反应迅速进行,并在10分钟内完成,从而提供了高收率的成环产物,而没有任何化学计量的金属氧化剂。从机理上讲,这种串联反应是通过直接的邻位CH烯丙基化,然后与近端的-CONH基团进行加氢胺化反应,得到6-甲基-5,6-二氢-8 H-异喹啉基[1,2 - b ]喹唑啉-8-一个操作即可完成。羧酸添加剂在活性催化剂的形成和原金属的脱金属中具有双重作用。