876-99-3Relevant articles and documents
Cobalt-Nitrenoid Insertion-Mediated Amidative Carbon Rearrangement via Alkyl-Walking on Arenes
Lee, Jeonghyo,Kang, Bora,Kim, Dongwook,Lee, Jia,Chang, Sukbok
supporting information, p. 18406 - 18412 (2021/11/16)
We herein disclose the Cp*Co(III)(LX)-catalyzed amidative alkyl migration using 2,6-disubstituted phenyl azidoformates. Upon the cobalt-nitrenoid insertion toward the substituted ortho carbon, an arenium cationic species bearing a quaternary carbon is generated, and a subsequent alkyl migration process is suggested to occur through an unforeseen alkyl-walking mechanism. A quinolinol ligand of the cobalt catalyst system is proposed to facilitate the final product-releasing rearomatization process by serving as an internal base. This new mechanistic mode enabled both [1,2]- and [1,4]-alkyl rearrangements to allow the structural variation of N-heterocyclic compounds.
2 - Chloro -3 - methyl benzoic acid and intermediate preparation method (by machine translation)
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Paragraph 0079; 0081-0083; 0088-0097; 0105-0106, (2018/10/11)
The invention discloses a 2 - chloro - 3 - methyl benzoic acid and intermediate preparation method. A 2 - chloro - 3 - methyl benzoic acid and intermediate preparation method, comprising the following steps, in the oxygen pressure is 0.1 mpa - 0.8 mpa under the condition of, under the action of the catalyst and promoter, the 2, 6 - dimethyl chlorobenzene to carry out oxidation reaction, can be; wherein said 2, 6 - dimethyl chlorobenzene and the oxygen molar amount ratio of 1: 1.8 - 1: 2.2. The 2 - chloro - 3 - methyl benzoic acid, in order to industrially easily available raw materials for the reaction, after treatment is simple, high yield, purity is good, small pollution to the environment, is more suitable for industrial. (by machine translation)
β-type glycosidic bond formation by palladium-catalyzed decarboxylative allylation
Xiang, Shaohua,Lu, Zhiqiang,He, Jingxi,Hoang, Kim Le Mai,Zeng, Jing,Liu, Xue-Wei
supporting information, p. 14047 - 14051 (2013/11/19)
The efficient and stereoselective construction of glycosidic linkages is of great significance in carbohydrate chemistry due to the ubiquitous existence of numerous biologically active natural products and saccharides. Although great efforts have been devoted to stereoselective glycosylations in the past few decades, constructing glycosidic bonds with high efficiency and selectivity remains a challenge and continues to be an important area in carbohydrate research. Phenols are widely used as nucleophiles in palladium-catalyzed allylation. In contrast, the possibility of using aliphatic alcohols as nucleophiles is not as thoroughly explored. The modified reaction conditions were then applied to other substrates. Originating from easily prepared carbonates, various glycosides, such as phenolic Oglycosides, thiophenolic S-glycoside, aliphatic O-glycosides, and even disaccharides, were synthesized in good yields by means of a palladium-catalyzed decarboxylative allylation.