Chemistry of salicylic acid and anthranilic acid. I. Reduction of methyl salicylate, methyl anthranilate and their derivatives with sodium borohydride.
摘要:
水杨酸的酯衍生物和某些类型的氨基苯酸用硼氢钠还原为相应的醇。还研究了4-氧-1,3-苯并二恶烷(IXa-b)、1,2-二氢-4-氧-3,1-苯并噁嗪(XIIa-c, e, k)和4-氧-3,1-苯并噁嗪(XVd-j)的还原行为。这些结果可以通过碳酰基的电子结构贡献或羟基或氨基的邻近参与来解释。
Concise synthesis of cyclic carbonyl compounds from haloarenes using phenyl formate as the carbonyl source
作者:Hideyuki Konishi、Hiroki Nagase、Kei Manabe
DOI:10.1039/c4cc09413a
日期:——
Carbonylative cyclization of haloarenes bearing nucleophilic moieties under Pd catalysis has been developed as a general, user-friendly method for access to various cyclic carbonyl compounds.
Palladium-Catalyzed Carbonylative Synthesis of Benzoxazinones from <i>N</i>-(<i>o</i>-Bromoaryl)amides Using Paraformaldehyde as the Carbonyl Source
作者:Wanfang Li、Xiao-Feng Wu
DOI:10.1021/jo5020118
日期:2014.11.7
Carbonylation reactions have been widely used in organic synthesis. However, the manipulation of toxic and pressurized carbonmonoxide limited their applications in organic laboratories. The search for alternative carbonyl sources as an important method for carbonylative organic synthesis is spreading. Herein, a series of substituted benzoxazinones were synthesized from N-(o-bromoaryl)amides by palladium-catalyzed
Recyclable palladium-catalyzed carbonylative annulation of 2-iodoanilines with acid anhydrides: A practical synthesis of 2-alkylbenzoxazinones
作者:Zebiao Zhou、Bin Huang、Mingzhong Cai
DOI:10.1080/00397911.2021.1966039
日期:2021.10.18
highly efficient heterogeneous palladium-catalyzedcarbonylative annulation of 2-iodoanilines and acidanhydrides has been developed. The reaction proceeds effectively in toluene using N,N-diisopropylethylamine (DiPEA) as the base at 100 °C under 2 bar of CO and provides a novel, general, and practical method for the assembly of a wide variety of 2-alkylbenzoxazinones with high functional group tolerance
摘要 已经开发了一种高效的多相钯催化的 2-碘苯胺和酸酐的羰基化环化。该反应在甲苯中使用N,N-二异丙基乙胺 (DiPEA) 作为碱在 100 °C 和 2 bar CO 下有效进行,为组装各种具有高官能团耐受性和良好的收率。这种负载的钯配合物可以很容易地从产物中分离出来,并通过反应溶液的简单过滤进行回收,并以几乎一致的催化效率重复使用多达七次。
A General Palladium-Catalyzed Carbonylative Synthesis of 2-Alkylbenzoxazinones from 2-Bromoanilines and Acid Anhydrides
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/chem.201202142
日期:2012.10.1
(C), its (O)K! An efficient palladium‐catalyzed carbonylativesynthesis of 2‐alkylbenzoxazinones has been developed (see scheme). By starting from 2‐bromoanilines and acidanhydrides, the corresponding products were isolated in good yields.
Pd–carbene catalyzed carbonylation reactions of aryl iodides
作者:Liqin Xue、Lijun Shi、Yuan Han、Chungu Xia、Han Vinh Huynh、Fuwei Li
DOI:10.1039/c1dt10433k
日期:——
A series of carbene complexes [PdBr2(iPr2-bimy)L] (C2âC13) with different types of co-ligands (L) have been tested for their catalytic activities in the carbonylative annulation of 2-iodophenol with phenylacetylene in DMF to afford the respective flavone 2a. Complex C12 with an N-phenylimidazole co-ligand showed the best activity and also afforded high yields when the substrate scope was extended to other aryl or pyridyl acetylenes. In addition, catalyst C12 was also efficient in the carbonylative annulation of 2-iodoaniline with acid chlorides giving the desirable 2-substituted 4H-3,1-benzoxazin-4-ones (4) in good yields. Additionally, this PdâNHC complex also proved to be a very efficient catalyst for the hydroxycarbonylation of iodobenzene derivatives at low catalyst loading and under low CO pressure. These results demonstrate the versatility and efficiency of this phosphine-free Pd(II)âNHC complex in different types of carbonylations of aryl iodides under mild conditions.