Palladium-Catalyzed Intra- and Intermolecular C–H Arylation Using Mesylates: Synthetic Scope and Mechanistic Studies
作者:Devin M. Ferguson、Stacey R. Rudolph、Dipannita Kalyani
DOI:10.1021/cs500587b
日期:2014.7.3
This paper describes the development of Pd-catalyzed inter- and intramolecular direct arylation using mesylates. Furthermore, a sequential mesylation/arylation protocol using phenols as substrates is described. These transformations are general with respect to the electronics of the C-H substrates and allow for the synthesis of diverse heterocyclic motifs in good yields. Both arenes and heteroarenes
Palladium-Catalyzed Intramolecular C–H Arylation of Arenes Using Tosylates and Mesylates as Electrophiles
作者:Christine S. Nervig、Peter J. Waller、Dipannita Kalyani
DOI:10.1021/ol302166n
日期:2012.9.21
paper describes a method for the palladium catalyzed intramolecular C–H arylation using tosylates and mesylates as electrophiles. The transformation is efficient for the synthesis of various heterocyclic motifs including furans, carbazoles, indoles, and lactams. Additionally, a protocol for the one-pot sequential tosylation/arylation of phenol derivatives is presented.
Beta-Naphthyl- und Beta-Tetrahydronaphthyl-phenyläther, Verfahren zu ihrer Herstellung und ihre Verwendung als herbizide Mittel
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0001804A1
公开(公告)日:1979-05-16
Substituierte β-Naphthol- und β-Tetrahydronaphthylphenyläther der Formel
worir R einen ggf. durch Alkyl oder Halogen (Cl, Br) substituierten β-Naphthyl- oder β-Tetrahydronaphthylrest, R1 H oder Alkyl, q 0,1 oder 2 und Z eine Carbonester-, Thiocarbonester-, Carbonamid-, Carbohydrazid-, Thioamid-, Nitril-, Alkohol-, Aldehyd-, Acetal-, Oxim-, Carboxylat-, Carbamat- oder Sulfonatgruppe darstellt, sind wertvolle Selektivherbizide.
取代的 β-萘酚和 β-四氢萘酚醚,其式中 R 代表任选被烷基或卤素(Cl、Br)取代的 β-萘基或 β-四氢萘基,R1 代表 H 或烷基,q 代表 0、1 或 2,Z 代表碳酯、硫代碳酯、碳酰胺、羧肼、硫酰胺、腈、醇、醛、缩醛、肟、羧酸盐、氨基甲酸酯或磺酸盐基团,是有价值的选择性除草剂。
Nickel-catalyzed intramolecular C–H arylation using aryl pivalates as electrophiles
作者:Jiayi Wang、Devin M. Ferguson、Dipannita Kalyani
DOI:10.1016/j.tet.2013.04.096
日期:2013.7
This paper describes a method for nickel catalyzed intramolecular C-H arylation using aryl pivalates as electrophiles. The transformation is efficient for the synthesis of diverse electronically and sterically differentiated dibenzofurans. Additionally, the method could be expanded toward the synthesis of carbazoles. Preliminary mechanistic studies of the transformation are also described. (C) 2013 Elsevier Ltd. All rights reserved.
Metal-free oxidative aromatization of 2-aryloxycyclohex-2-en-1-ones to 2-aryloxyphenols using DDQ/Amberlyst-15
作者:B. G. Jadhav、S. D. Samant
DOI:10.1134/s1070428014090115
日期:2014.9
Efficient metal-free oxidative aromatization of 2-aryloxycyclohex-2-en-1-ones was achieved by a combination of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) and Amberlyst-15. The conditions for oxidative aromatization are mild and applicable for a variety of substrates, and Amberlyst-15 can be successfully recovered and recycled.