Photoinduced Cross-Coupling of Aryl Iodides with Alkenes
作者:Yuliang Liu、Haoyu Li、Shunsuke Chiba
DOI:10.1021/acs.orglett.0c03935
日期:2021.1.15
A protocol for photoinduced cross-coupling of aryliodides having polar π-functional groups or elongated π-conjugation with alkenes has been developed. The radical cascade mechanism involving generation of aryl radicals via C–I bond homolysis of photoexcited aryliodides and their subsequent addition to alkenes is proposed. The method enables iodide-selective cross-coupling over other halogen leaving
Allylic alcohols can be used directly for the palladium(0)-catalyzed allylation of aryl- and alkenylboronic acids with a wide variety of functional groups. A triphenylphosphine-ligated palladium catalyst turns out to be most effective for the cross-coupling reaction and its low loading (less than 1 mol%) leads to formation of the coupling product in high yield. The Lewis acidity of the organoboron
Palladium(0)-catalyzed direct cross-coupling reaction of allyl alcohols with aryl- and vinyl-boronic acidsElectronic supplementary information (ESI) available: spectral data of compounds. See http://www.rsc.org/suppdata/cc/b4/b402256d/
Allyl alcohols can be directly used for the palladium-catalyzed allylation of aryl- and vinyl-boronic acids without the aid of a base.
烯丙醇可直接用于芳基硼酸和乙烯基硼酸的钯催化烯丙基化,无需碱的帮助。
Pd(OAc)<sub>2</sub>/P(<i><sup>c</sup></i>C<sub>6</sub>H<sub>11</sub>)<sub>3</sub>-Catalyzed Allylation of Aryl Halides with Homoallyl Alcohols via Retro-Allylation
fashion via a conformationally regulated six-membered cyclic transition state, the allylation reactions are highly regio- and stereospecific when homoallyl alcohols having a substituted allyl group are used. Whereas triarylphosphine is known to serve as a ligand for the palladium-catalyzed allyl transfer reactions, tricyclohexylphosphine proves to significantly expand the scopes of aryl halides to electron-rich
A New Cobalt–Salen Catalyst for Asymmetric Cyclopropanation. Synthesis of the Serotonin–Norepinephrine Repuptake Inhibitor (+)-Synosutine
作者:James D. White、Subrata Shaw
DOI:10.1021/ol501549x
日期:2014.8.1
A new C2 symmetric cobalt(II)–salen catalyst based on cis-2,5-diaminobicyclo[2.2.2]octane as the chiral scaffold was prepared which, in the presence of potassium thioacetate as the promoter, catalyzed the formation of cyclopropanes from 1,1-disubstituted ethylenes and ethyl diazoacetate in high yield and with excellent diastereo- and enantioselectivity. Asymmetriccyclopropanation with the catalyst