Preparation of (<i>E</i>)-1,3-Enyne Derivatives through Palladium Catalyzed Hydroalkynylation of Allenes
作者:Zhi-Kai Liu、Ying Yang、Zhuang-Ping Zhan
DOI:10.1021/acs.joc.1c02732
日期:2022.1.21
A general and efficient palladium catalyzed hydroalkynylation of allenes was developed to produce synthetically versatile (E)-1,3-enyne derivatives with highregio- and stereoselectivity. This catalytic system proceeded under mild conditions and was compatible with a broad range of substrates, especially for allenes without electron-bias groups. This work further broadens the synthetic potential of
开发了一种通用且有效的钯催化的丙二烯氢化炔基化反应,以生产具有高区域和立体选择性的合成通用 ( E )-1,3-烯炔衍生物。该催化体系在温和条件下进行,并且与广泛的底物相容,特别是对于没有电子偏压基团的丙二烯。这项工作进一步拓宽了这些支架在有机合成和药物化学中的合成潜力。
Regioselective Intramolecular Allene Amidation Enabled by an EDA Complex**
作者:Lu Liu、Robert M. Ward、Jennifer M. Schomaker
DOI:10.1002/chem.202002533
日期:2020.11.2
The addition of radicals to unsaturated precursors is a powerful tool for the synthesis of both carbo‐ and heterocyclic organic building blocks. The recent advent of mild ways to generate N‐centered radicals has reignited interest in exploiting highly regio‐, chemo‐, and stereoselective transformations that employ these reactive intermediates. While the additions of aminyl, iminyl, and amidyl radicals
A Regio- and Enantioselective CuH-Catalyzed Ketone Allylation with Terminal Allenes
作者:Erica Y. Tsai、Richard Y. Liu、Yang Yang、Stephen L. Buchwald
DOI:10.1021/jacs.7b12271
日期:2018.2.14
We report a method for the highly enantioselective CuH-catalyzed allylation of ketones that employs terminalallenes as allylmetal surrogates. Ketones and allenes bearing diverse and sensitive functional groups are efficiently coupled with high stereoselectivity and exclusive branched regioselectivity. In stoichiometric experiments, each elementary step of the proposed hydrocupration-addition-metathesis
Allylic sulfones are important building blocks in organic synthesis and pharmaceutical chemistry. Herein, we disclose a chemodivergent protocol for Pd-catalyzed and ligand-controlled coupling of allenes with sulfinicacids, providing straightforward and atom-economical access to branched allylic sulfones and linear allylic sulfones bearing a conjugated (Z,E)-1,3-diene scaffold in good yields with high