Direct Access to Primary Amines from Alkenes by Selective Metal‐Free Hydroamination
作者:Yi‐Dan Du、Bi‐Hong Chen、Wei Shu
DOI:10.1002/anie.202016679
日期:2021.4.26
selective synthesis of primary aminesfrom easily available precursors is attractive yet challenging. Herein, we report the rapid synthesis of primary aminesfrom alkenes via metal‐free regioselective hydroamination at room temperature. Ammonium carbonate was used as ammonia surrogate for the first time, allowing for efficient conversion of terminal and internal alkenes into linear, α‐branched, and α‐tertiary
Redox-Triggered CC Coupling of Diols and Alkynes: Synthesis of β,γ-Unsaturated α-Hydroxyketones and Furans by Ruthenium-Catalyzed Hydrohydroxyalkylation
作者:Emma L. McInturff、Khoa D. Nguyen、Michael J. Krische
DOI:10.1002/anie.201311130
日期:2014.3.17
ruthenium‐catalyzed CCcoupling of alkynes and vicinal diols to form β,γ‐unsaturated ketones occurs with complete levels of regioselectivity and good to complete control over the alkene geometry. Exposure of the reaction products to substoichiometric quantities of p‐toluenesulfonic acid induces cyclodehydration to form tetrasubstituted furans. These alkyne‐diolhydrohydroxyalkylations contribute to a
Synthesis of Pyrrolidine Derivatives by a Platinum/Brønsted Acid Relay Catalytic Cascade Reaction
作者:Alicia Galván、Jonás Calleja、Francisco J. Fañanás、Félix Rodríguez
DOI:10.1002/chem.201405776
日期:2015.2.16
A new catalyticreaction for the synthesis of pyrrolidinederivatives is presented. The method implies the coupling of N‐Boc‐protected alkynamine derivatives and appropriate alkenes or alkynes in a process catalysed by a platinum/triflic acidcatalytic binary system. This reaction is believed to proceed through a cascade process implying an initial platinum‐catalysed cycloisomerization of the alkynamine
Ruthenium(0)-Catalyzed C–C Coupling of Alkynes and 3-Hydroxy-2-oxindoles: Direct C–H Vinylation of Alcohols
作者:Tom Luong、Shujie Chen、Ke Qu、Emma L. McInturff、Michael J. Krische
DOI:10.1021/acs.orglett.7b00174
日期:2017.2.17
Upon exposure to a ruthenium(0) catalyst, N-benzyl-3-hydroxy-2-oxindoles react with diverse alkynes to form products of C–H vinylation with complete control of regioselectivity and olefin geometry. This method contributes to a growing body of catalytic processes that enable direct conversion of lower alcohols to higher alcohols in the absence of stoichiometric organometallic reagents.
Multicomponent and multicatalytic asymmetric synthesis of furo[2,3-<i>b</i>]pyrrole derivatives: further insights into the mode of action of chiral phosphoric acid catalysts
作者:Lara Cala、Pedro Villar、Ángel R. de Lera、Francisco J. Fañanás、Rosana Álvarez、Félix Rodríguez
DOI:10.1039/d0sc03342a
日期:——
development of asymmetric versions of these reactions is a step forward in our dream of mirroring the exquisite selectivity of biological processes. In this context, the present work describes a new reaction for the asymmetric synthesis of furo[2,3-b]pyrrole derivatives from simple 3-butynamines, glyoxylic acid and anilines in the presence of a dual catalytic system, formed from a gold complex and a chiral phosphoric