Photocatalytic acyl azolium-promoted alkoxycarbonylation of trifluoroborates
作者:Joshua L. Zhu、Karl A. Scheidt
DOI:10.1016/j.tet.2021.132288
日期:2021.7
and coupling of organic radical species, the alkoxycarbonylradical remains underexplored relative to other carbon-containing radical species. Drawing inspiration from new strategies for generating acyl radical equivalents utilizing dual N-heterocyclic carbene catalysis and photocatalysis, we have prepared dimethylimidazolium esters that can function as an alkoxycarbonylradical surrogate under photocatalytic
Synthesis of α-Aryl Esters and Nitriles: Deaminative Coupling of α-Aminoesters and α-Aminoacetonitriles with Arylboronic Acids
作者:Guojiao Wu、Yifan Deng、Chaoqiang Wu、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201406765
日期:2014.9.22
Transition‐metal‐free synthesis of α‐arylesters and nitriles using arylboronicacids with α‐aminoesters and α‐aminoacetonitriles, respectively, as the starting materials has been developed. The reaction represents a rare case of converting C(sp3)N bonds into C(sp3)C(sp2) bonds. The reaction conditions are mild, demonstrate good functional‐group tolerance, and can be scaled up.
A Metallaphotoredox Strategy for the Cross‐Electrophile Coupling of α‐Chloro Carbonyls with Aryl Halides
作者:Tiffany Q. Chen、David W. C. MacMillan
DOI:10.1002/anie.201909072
日期:2019.10.7
effective for a wide variety of aryl bromide coupling partners, is predicated upon a halogen atom abstraction/nickel radical-capture mechanism that is generically successful across an extensive range of carbonyl substrates. The construction and use of arylacetic acid products have further enabled two-step protocols for the delivery of valuable building blocks for medicinal chemistry, such as aryldifluoromethyl
A bis-trifluoroethyl coordinated nickel/bipyridine complex has been developed as efficient precatalyst for diverse Suzuki-type alkylations which features unconventional precatalyst initiation mode.
Photoassisted Cross-Coupling Reaction of α-Chlorocarbonyl Compounds with Arylboronic Acids
作者:Naoki Oku、Masahiro Murakami、Tomoya Miura
DOI:10.1021/acs.orglett.2c00121
日期:2022.3.4
A Suzuki-Miyaura cross-coupling reaction of α-chloroacetates or α-chloroacetamides with arylboronicacids is made possible by visible-light irradiation. This reaction provides a useful method for the synthesis of α-arylacetates and α-arylacetamides from chlorides under mild reaction conditions. An indole-3-acetic acid derivative that is the key intermediate of the plant hormone auxin can be synthesized