Copper-Catalyzed Propargylic Reduction with Diisobutylaluminum Hydride
作者:Yuna Kim、Hanseul Lee、Sunga Park、Yunmi Lee
DOI:10.1021/acs.orglett.8b02413
日期:2018.9.7
A mild and efficient method for the synthesis of allenes through selective copper-catalyzed hydride addition to propargylic chlorides using commercially available diisobutylaluminum hydride has been developed. This transformation, which is promoted by a readily accessible N-heterocyclic carbene–copper complex, provides a wide range of new and versatile functionalized allenes in good to excellent yields
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。
Chromium‐Catalyzed Selective Dimerization/Hydroboration of Allenes to Access Boryl‐Functionalized Skipped (
<i>E</i>
,
<i>Z</i>
)‐Dienes
作者:Yinsong Zhao、Shaozhong Ge
DOI:10.1002/anie.202012344
日期:2021.1.25
dimerization/hydroboration of allenes is developed to access synthetically versatile boryl‐functionalized skippeddienes with a catalyst generated in situ from CrCl2 and a pyridine‐2,6‐diimine ligand mesPDI. A variety of allenes reacted with pinacolborane (HBpin) to afford the corresponding boryl‐functionalized (E,Z)‐1,4‐dienes in high yields and with excellent selectivity. Electron paramagnetic resonance (EPR) spectroscopic
Contrasteric coupling of allenes and tetrahydroisoquinolines by iron-catalysed allenic C(sp<sup>2</sup>)–H functionalisation
作者:Yue Xia、Nicholas W. Wade、Philip N. Palermo、Yidong Wang、Yi-Ming Wang
DOI:10.1039/d1cc05949a
日期:——
An iron-catalysed C–H functionalisation of simple monosubstituted allenes for the synthesis of 1-tetrahydroisoquinolinyl 1,1-disubstituted allenes is reported.
一种铁催化的简单单取代烯烃的C-H官能化反应,用于合成1-四氢异喹啉基1,1-二取代烯烃。
A Bithiophene‐Promoted ppm Levels of Palladium‐Catalyzed Regioselective Hydrosilylation of Terminal Allenes
hydrosilylation of allenes with primary and secondary phenylsilanes. It shows high selectivity towards the production of branched allylsilanes with a wide range of allenes. It is worth mentioning that the catalytic loading of the palladium can be reduced to 500 ppm. This work opens a new front of using bidentate thiophene ligand as a reaction promoter in transition‐metal‐catalyzed organic reaction.