Synthetic Applications of Pd(II)-Catalyzed C−H Carboxylation and Mechanistic Insights: Expedient Routes to Anthranilic Acids, Oxazolinones, and Quinazolinones
作者:Ramesh Giri、Jonathan K. Lam、Jin-Quan Yu
DOI:10.1021/ja9077705
日期:2010.1.20
carbon monoxide is discussed. Identification of two key intermediates, a mixed anhydride and benzoxazinone formed by reductive elimination from organometallic Ar(CO)Pd(II)-OTs species, provides mechanistic evidence for a dual-reaction pathway.
CO and CO again: A new double carbonylation methodology for the synthesis of 2‐arylbenzoxazinones has been developed (see scheme).
一氧化碳和一氧化碳:已开发出一种用于合成2-芳基苯并恶嗪酮的新型双羰基化方法(参见方案)。
One-Pot Synthesis of Quinazolin-4(3<i>H</i>)-ones through Anodic Oxidation and the Related Mechanistic Studies
作者:Liu Cao、Hengrui Huo、Haipeng Zeng、Yu Yu、Dengfu Lu、Yuefa Gong
DOI:10.1002/adsc.201800927
日期:2018.12.21
A metal‐free and oxidant‐free method for the one‐pot preparation of quinazolin‐4(3H)‐ones enabled by electrochemical oxidation is described. Together with 2‐aminobenzamides, a variety of aldehydes were successfully applied to an acid‐catalyzed annulation and direct anodic oxidation cascade, affording structurally diverse quinazoline‐4(3H)‐ones in good to excellent yields. Additionally, certain alcohols
α-Hydroxy acid as an aldehyde surrogate: metal-free synthesis of pyrrolo[1,2-<i>a</i>]quinoxalines, quinazolinones, and other N-heterocycles <i>via</i> decarboxylative oxidative annulation reaction
and efficient procedure for the synthesis of pyrrolo[1,2-a]quinoxalines, quinazolinones, and indolo[1,2-a]quinoxaline has been developed. The key features of our method include the in situ generation of aldehyde from α-hydroxy acid in the presence of TBHP (tert-butyl hydrogen peroxide), and further condensation with various amines, followed by intramolecular cyclization and subsequent oxidation to afford
开发了一种无金属且有效的合成吡咯并[1,2- a ]喹喔啉、喹唑啉酮和吲哚[1,2- a ]喹喔啉的方法。该方法的主要特点包括在 TBHP(叔丁基过氧化氢)存在下,由 α-羟基酸原位生成醛,并与各种胺进一步缩合,然后进行分子内环化和随后的氧化,得到相应的喹喔啉、喹唑啉酮衍生物,产率中等至高。
Synthesis of 2-aryl quinazolinones <i>via</i> iron-catalyzed cross-dehydrogenative coupling (CDC) between N–H and C–H bonds
作者:Yoonkyung Jang、Seok Beom Lee、Junhwa Hong、Simin Chun、Jeeyeon Lee、Suckchang Hong
DOI:10.1039/d0ob00866d
日期:——
describe the direct synthesis of quinazolinones via cross-dehydrogenative coupling between methylarenes and anthranilamides. The C–H functionalization of the benzylic sp3 carbon is achieved by di-t-butyl peroxide under air, and the subsequent amination–aerobic oxidation process completes the annulation process. Iron catalyzed the whole reaction process and various kinds of functional groups were tolerated