An article Sterically Hindered Amination of Aryl Chlorides Catalyzed by a New Carbazolyl-Derived P,N-Ligand-Composed Palladium Complex WOS:000474929900006 published article about N-HETEROCYCLIC CARBENE; BUCHWALD-HARTWIG AMINATION; C-N; SUZUKI-MIYAURA; REDUCTIVE AMINATION; COUPLING REACTIONS; PHOSPHINE-LIGANDS; PRIMARY AMINES; EFFICIENT; ARYLATION in [Lai, Wing In; Leung, Man Pan; Choy, Pui Ying; Kwong, Fuk Yee] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China in 2019.0, Cited 93.0. The Name is 1-Chloro-2-methylbenzene. Through research, I have a further understanding and discovery of 95-49-8. HPLC of Formula: C7H7Cl
A family of 2-(9H-carbazol-9-yl)phenyl-based phosphine ligands were synthesized and their efficacy in promoting the steric hindered Buchwald-Hartwig amination was evaluated. In the presence of Pd(OAc) (2) (0.03-1.0 mol%) associated with the newly developed a carbazolyl-derived phosphine ligand, the synthesis of tetra- ortho -substituted diarylamines proceeded smoothly with excellent product yields (up to 99%). A remarkable result was obtained even for the coupling of highly sterically congested 2,6-diisopropylaniline and hindered 2-chloro-1,3,5-triisopropylbenzene (96% isolated yield). A possible decomposition pathway for the anthracenyl C-N coupling product is also reported.
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Reference:
Patent; Nanjing Zhongteng Chemical Co., Ltd.; Zhong Hua; Lu Minshan; Chen Xiuzhen; Liu Qiaobao; Yin Hengbo; Wang Aili; (8 pag.)CN104876790; (2017); B;,
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