作者:Can-Can Bao、Dong-Song Zheng、Xiao Zhang、Shu-Li You
DOI:10.1021/acs.organomet.8b00762
日期:2018.12.24
N-Heterocyclic carbenes (NHCs) were found to be suitable ligands in Ir-catalyzed intermolecular allylic alkylation reaction. In the presence of a catalyst derived from [Ir(dncot)Cl]2 (dncot = dinaphthocyclooctatetraene) and triazolium salt L7, the alkylation products from the reaction of aryl allyl carbonates with sodium dialkyl malonates could be obtained in 85–99% yields favoring the formation of
发现N-杂环卡宾(NHC)是Ir催化的分子间烯丙基烷基化反应中的合适配体。在[Ir(dncot)Cl] 2(dncot =二萘环辛酸酯四烯)和三唑鎓盐L7衍生的催化剂存在下,芳基烯丙基碳酸酯与二烷基丙二酸钠的反应可得到烷基化产物,收率高达85-99%,形成支链产物(90/10→> 99/1 b / l)。此外,手性二氢异喹啉型NHC(DHIQ-NHC)(L8)已成功应用于Ir催化的不对称烯丙基烷基化反应中。对于广泛的底物,获得了优异的对映选择性和中等的区域选择性。
Enantioselective synthesis of 2,5-dihydrobenzo[b]azepine derivatives via iridium-catalyzed asymmetric allylic amination with 2-allylanilines and ring-closing-metathesis reaction
作者:Ke-Yin Ye、Li-Xin Dai、Shu-Li You
DOI:10.1039/c2ob00036a
日期:——
Iridium-catalyzed asymmetric allylicamination of allylic carbonates with 2-allylanilines was realized. With a catalyst generated from 2 mol% of [Ir(dbcot)Cl]2 (dbcot = dibenzo[a,e]cyclooctatetraene) and 4 mol% of phosphoramidite ligand (L3), the amination products were obtained in up to 99% yield and 99% ee. Subjecting amination products to trifluoroacetyl protection and ring-closing-metathesis reaction
实现了铱催化的2-烯丙胺与碳酸烯丙酯的不对称烯丙基胺化反应。使用由2 mol%的[Ir(dbcot)Cl] 2(dbcot =二苯并[ a,e ]环辛酸酯)和4 mol%的亚磷酰胺配体(L3)生成的催化剂,可获得高达99%的收率的胺化产物。和99%ee。使胺化产物经受三氟乙酰基保护和闭环复分解反应提供了对映体富集的2,5-二氢苯并[ b ]氮杂卓衍生物的有效合成。
Enantioselective synthesis of 10-allylanthrones via iridium-catalyzed allylic substitution reaction
作者:Zheng-Le Zhao、Qing Gu、Xin-Yan Wu、Shu-Li You
DOI:10.1016/j.cclet.2016.02.017
日期:2016.5
Abstract A highly enantioselective allylicsubstitution reaction of anthrones with aromatic or aliphatic allyl carbonates was realized by using iridium catalyst prepared from [Ir(COD)Cl]2 and BHPphos. Substituted 10-allylanthrones were obtained in excellent yields and with excellent enantioselectivity and regioselectivity (up to 98% yield, 99% ee) under mild conditions.
Regio- and Enantioselective Synthesis of<i>N</i>-Allylindoles by Iridium-Catalyzed Allylic Amination/Transition-Metal-Catalyzed Cyclization Reactions
作者:Ke-Yin Ye、Li-Xin Dai、Shu-Li You
DOI:10.1002/chem.201400026
日期:2014.3.10
Regio‐ and enantioselectivesynthesis of N‐allylindoles was realized through an iridium‐catalyzed asymmetric allylicaminationreaction with 2‐alkynylanilines and subsequent transition‐metal‐catalyzed cyclizationreactions. The highly enantioenriched allylic amines prepared from Ir‐catalysis were treated with catalytic amount of NaAuCl4⋅2 H2O or PdCl2 providing various substituted N‐allylindoles in
Organophotoredox/palladium dual catalytic decarboxylative Csp<sup>3</sup>–Csp<sup>3</sup>coupling of carboxylic acids and π-electrophiles
作者:Kaitie C. Cartwright、Jon A. Tunge
DOI:10.1039/d0sc02609c
日期:——
A dual catalytic decarboxylative allylation and benzylation method for the construction of new C(sp3)–C(sp3) bonds between readily available carboxylic acids and functionallydiverse carbonate electrophiles has been developed. The new process is mild, operationally simple, and has greatly improved upon the efficiency and generality of previous methodology. In addition, new insights into the reaction