Competing Regiochemical Pathways in the Heck Arylation of 1,2-Dihydronaphthalene
摘要:
The Heck reaction of aryl iodides with 1,2-dihydronaphthalene has been examined. Two separate reaction pathways are observed under all the conditions tried. Arylation adjacent to the aromatic ring leads to a subsequent double bond shift such that the product is a 1-aryl-1,2-dihydronaphthalene. The alternative regiochemistry leads to production of the corresponding 3-aryl-1,2-dihydronaphthalene, and labelling studies with specifically deuterated alkenes demonstrate that this is most likely to be the result of a trans Pd-H elimination pathway. The ratio always varies between 75:25 in favour of the 3-aryl product (Jeffery conditions) to 70:30 in favour of the 1-aryl product.
Nickel-Catalyzed Efficient and Practical Suzuki−Miyaura Coupling of Alkenyl and Aryl Carbamates with Aryl Boroxines
作者:Li Xu、Bi-Jie Li、Zhen-Hua Wu、Xing-Yu Lu、Bing-Tao Guan、Bi-Qin Wang、Ke-Qing Zhao、Zhang-Jie Shi
DOI:10.1021/ol9029534
日期:2010.2.19
Suzuki−Miyaura coupling of unactivated alkenyl carbamates is described to construct polysubstituted olefins. The developed process is also suitable for heteroaromatic and even electron-richaromatic carbamates.
Pd-Catalyzed Cross-Coupling of Highly Sterically Congested Enol Carbamates with Grignard Reagents via C–O Bond Activation
作者:Zicong Chen、Chau Ming So
DOI:10.1021/acs.orglett.0c01127
日期:2020.5.15
The palladium-catalyzed cross-coupling reaction of enol carbamates to construct highly sterically congested alkenyl compounds is presented for the first time. This protocol demonstrates the potential of using thermally stable and highly atom-economic enol electrophiles as building blocks in bulky alkene synthesis. This reaction accommodates a broad substrate scope with excellent Z/E isomer ratios,
2-Naphthyl acetic acid derivatives and compositions and methods thereof
申请人:Syntex Corporation
公开号:US03978116A1
公开(公告)日:1976-08-31
2-Naphthyl acetic acid derivatives and the corresponding amides, esters, hydroxamic acids and addition salts thereof, optionally substituted at the .alpha.-position on the acetic acid moiety and/or at position 6 and/or at positions 1, 4, 7 or 8 on the naphthyl ring and optionally saturated at positions 3 and 4, are anti-inflammatory, analgesic, anti-pyretic and anti-pruritic agents. A pharmaceutical method of effecting treatment of inflammation, pain, pyrexia and pruritus by the administration of naphthyl acetic acid derivatives. A pharmaceutical composition for use in the treatment of the above maladies comprising a naphthyl acetic acid derivative.