Tandem Regioselective Hydroformylation-Hydrogenation of Internal Alkynes Using a Supramolecular Catalyst
作者:Weiwei Fang、Bernhard Breit
DOI:10.1002/anie.201809073
日期:2018.11.5
electron‐withdrawing groups. By applying this novel catalytic system, a general protocol for the Rh‐catalysed hydroformylation‐hydrogenation of unsymmetrical internal alkynes, functionalized with a carboxylic acid, was found to furnish aliphatic aldehydes in high regio‐ and chemoselectivities. Control experiments confirm the enzyme‐like supramolecular catalyst mode of action.
Cascade Reaction of Alkynols and 7-Oxabenzonorbornadienes Involving Transient Hemiketal Group Directed C–H Activation and Synergistic Rh<sup>III</sup>/Sc<sup>III</sup> Catalysis
作者:Deng Yuan Li、Liang Liang Jiang、Shuang Chen、Zheng Lu Huang、Li Dang、Xin Yan Wu、Pei Nian Liu
DOI:10.1021/acs.orglett.6b02587
日期:2016.10.7
As the first cascade C–Hactivationdirected by a transient group, reaction of alkynols and 7-oxabenzonorbornadienes has been achieved via synergistic rhodium and scandium catalysis to afford spirocyclic dihydrobenzo[a]fluorenefurans. This transformation proceeds by a transient hemiketal group directedC–Hactivation, dehydrative naphthylation, and intramolecular Prins-type cyclization. Mechanistic
作为由一个瞬态基团控制的第一个级联C–H活化,炔醇与7-氧杂苯并降冰片二烯的反应已通过协同的铑和scan催化作用而得到,以提供螺环二氢苯并[ a ]芴呋喃。这种转化是通过一个半胱氨酸基团直接引导C–H活化,脱水萘化和分子内Prins型环化而进行的。机理研究和密度泛函理论计算表明,决定速率的步骤是C–H键断裂,瞬态半酮基和协同Rh III / Sc III催化均起关键作用。
The Combination of Relay and Cooperative Catalysis with a Gold/Palladium/Brønsted Acid Ternary System for the Cascade Hydroamination/Allylic Alkylation Reaction
作者:Hua Wu、Yu-Ping He、Liu-Zhu Gong
DOI:10.1002/adsc.201100922
日期:2012.4.16
The combination of relay and cooperative catalysis with a gold/palladium/Brønstedacid ternary system renders a cascade hydroamination/allylic alkylation reaction to provide an unprecedented entry to pyrrolidinederivatives in high yields.
Gold(I)‐Catalyzed Domino Reaction: An Access to Furooxepines
作者:Roméric Galéa、Gaëlle Blond
DOI:10.1002/adsc.202200019
日期:2022.4.26
bicyclic acetals, also named furooxepines through a gold(I)-catalyzed domino reaction. During this transformation, two molecules of homopropargyl alcohol react together, in a sequence including an intramolecular hydroalkoxylation, condensation, a 1,6-enyne cycloisomerization, acetalization and an isomerization. This gold(I)-catalyzed domino reaction allow the formation of three bonds, two heterocycles
bistriflimide efficiently promotes three-component regioselective cyclization of tetrahydrofuro[2,3-d]oxazoles and oxazoles from homopropargyl alcohols bearing a phenyl group, with different substituents on the aryl alkyne compounds affecting the selectivity of the resulting product. Utilizing the hydroxyethyl oxazole derivatives obtained in this research could aid in the development of various peroxisome
高价碘试剂与双曲马特的反应有效地促进了四氢呋喃[2,3- d ]恶唑和恶唑从带有苯基的高炔丙醇中的三组分区域选择性环化,芳基炔烃化合物上的不同取代基影响所得产物的选择性. 利用本研究中获得的羟乙基恶唑衍生物有助于开发各种过氧化物酶体增殖物激活受体激动剂衍生物。 全尺寸图像