Ligand-accelerated non-directed C–H functionalization of arenes
作者:Peng Wang、Pritha Verma、Guoqin Xia、Jun Shi、Jennifer X. Qiao、Shiwei Tao、Peter T. W. Cheng、Michael A. Poss、Marcus E. Farmer、Kap-Sun Yeung、Jin-Quan Yu
DOI:10.1038/nature24632
日期:2017.11
challenges associated with the lack of sufficiently active palladium catalysts. Currently used palladium catalysts are reactive only with electron-rich arenes, unless an excess of arene is used, which limits synthetic applications. Here we report a 2-pyridone ligand that binds to palladium and accelerates non-directed C–H functionalization with arene as the limiting reagent. This protocol is compatible with
Synthesis of Allylsilanes via Nickel-Catalyzed Cross-Coupling of Silicon Nucleophiles with Allyl Alcohols
作者:Bo Yang、Zhong-Xia Wang
DOI:10.1021/acs.orglett.9b02946
日期:2019.10.4
NiCl2(PMe3)2-catalyzed reaction of allylalcohols with silylzinc reagents, including PhMe2SiZnCl, Ph2MeSiZnCl, and Ph3SiZnCl, was performed, achieving allylsilanes in high yields. Aryl- and heteroaryl-substituted allylalcohols, (E)-3-arylprop-2-en-1-ols, 1-aryl-prop-2-en-1-ols, and (E)-1-phenylpent-1-en-3-ol can be employed in the transformation. A range of functional groups as well as heteroaryl
β-Ketophosphonates formation via deesterification or deamidation of cinnamyl/alkynyl carboxylates or amides with H-phosphonates
作者:Yao Zhou、Mingxin Zhou、Ming Chen、Jihu Su、Jiangfeng Du、Qiuling Song
DOI:10.1039/c5ra23950h
日期:——
We report here an unprecedented Fe/Cu synergistically catalyzed deesterificative or deamidative oxyphosphorylation of unsaturated carboxylates or amides with H-phosphonates.
Boron-Templated Dimerization of Allylic Alcohols To Form Protected 1,3-Diols via Acid Catalysis
作者:S. Hadi Nazari、Kelton G. Forson、Erin E. Martinez、Nicholas J. Hansen、Kyle J. Gassaway、Nathan M. Lyons、Karissa C. Kenney、Gabriel A. Valdivia-Berroeta、Stacey J. Smith、David J. Michaelis
DOI:10.1021/acs.orglett.9b03760
日期:2019.12.6
boron-templated dimerization of allylicalcohols that generates a 1,3-diol product with two stereogenic centers in high yield and diastereoselectivity. This acid-catalyzed reaction is achieved via in situ formation of a boronic ester intermediate that facilitates selective cyclization and formation of a cyclic boronic ester product. High yields are observed with a variety of allylicalcohols, and mechanistic studies
building on reductive coupling is a powerful method for the preparation of organic compounds. The identification of environmentally benign reductants is key for establishing an efficientreductive coupling reaction. Herein an efficient strategy enabling H2 as the sole reductant for the palladium-catalyzed allyl–allyl reductive coupling reaction is described. A wide range of allylamines and allylic alcohols