Chemoselective Reductive Amination of Aldehydes and Ketones by Dibutylchlorotin Hydride-HMPA Complex
作者:Toshihiro Suwa、Erika Sugiyama、Ikuya Shibata、Akio Baba
DOI:10.1055/s-2000-6273
日期:——
Reductive amination of various aldehydes and ketones has been performed effectively by pentacoordinate chloro-substituted tin hydride complex, Bu2SnClH-HMPA. The tin reagent worked particularly well for the case using weakly basic aromatic amines as starting substrates. Stoichiometric amounts of a substrate and a reducingagent were adequate for the reaction. The Sn-Cl bond in the complex plays an
Dichotomy of Reductive Addition of Amines to Cyclopropyl Ketones vs Pyrrolidine Synthesis
作者:Oleg I. Afanasyev、Alexey A. Tsygankov、Dmitry L. Usanov、Denis Chusov
DOI:10.1021/acs.orglett.6b02945
日期:2016.11.18
interesting catalytic dichotomy was discovered: switching between simple ligand-free catalysts leads to fundamentally different outcomes of reductive reaction between amines and α-carbonylcyclopropanes. Whereas a rhodium catalyst leads to the traditional reductive amination product, ruthenium catalysis enables a novel reaction of pyrrolidine synthesis via ring expansion. The protocols do not require an
One‐Pot Transfer Hydrogenation Reductive Amination of Aldehydes and Ketones by Iridium Complexes “on Water”
作者:Lu Ouyang、Yanping Xia、Jianhua Liao、Renshi Luo
DOI:10.1002/ejoc.202001097
日期:2020.10.31
An efficient and practical one-pot transfer hydrogenation reductive amination of aldehydes and ketones with amines has been developed by using iridium complexes as catalysts and formic acid as hydrogen source in aqueous, providing an environmentalfriendly methodology for the construction of a wide range of functionalized amine compounds in excellent yields (80%~95%) This effective methodology can
Silver-Catalyzed Alkyne Activation: The Surprising Ligand Effect
作者:Yijin Su、Mei Lu、Boliang Dong、Hao Chen、Xiaodong Shi
DOI:10.1002/adsc.201300785
日期:2014.3.10
An unexpected ligand effect was discovered in the silver(I)‐catalyzed alkyneactivation. For both aldehyde‐alkyne‐amine (A3) condensation and intermolecular alkynehydroamination, the type B complex (P:Ag=1:1) effectively promoted the reaction, while no reaction occurred with either no ligand or excess ligands under the identical conditions.
Reductive Amination by Photoredox Catalysis and Polarity-Matched Hydrogen Atom Transfer
作者:Xingwei Guo、Oliver S. Wenger
DOI:10.1002/anie.201711467
日期:2018.2.23
compounds with amines by photoredoxcatalysis proceeds in good to excellent yields and with broad substrate scope and good functional group tolerance. The three key features of this work are 1) the rapid interception of electron‐rich α‐aminoalkyl radical intermediates by polarity‐matched HAT in a photoredox reaction, 2) the method of reductive amination by photoredoxcatalysis itself, and 3) the application