Phosphine-Free Well-Defined Mn(I) Complex-Catalyzed Synthesis of Amine, Imine, and 2,3-Dihydro-1<i>H</i>-perimidine via Hydrogen Autotransfer or Acceptorless Dehydrogenative Coupling of Amine and Alcohol
report the synthesis of amines/imines directly from alcohol and amines via hydrogen autotransfer or acceptorless dehydrogenation catalyzed by well-defined phosphine-free Mn complexes. Both imines and amines can be obtained from the same set of alcohols and amines using the same catalyst, only by tuning the reaction conditions. The amount and nature of the base are found to be a highly important aspect for
Reductive Amination Revisited: Reduction of Aldimines with Trichlorosilane Catalyzed by Dimethylformamide─Functional Group Tolerance, Scope, and Limitations
作者:Kirill K. Popov、Joanna L. P. Campbell、Ondřej Kysilka、Jan Hošek、Christopher D. Davies、Milan Pour、Pavel Kočovský
DOI:10.1021/acs.joc.1c01561
日期:2022.1.21
Aldimines, generated in situ fromaliphatic, aromatic, and heteroaromaticaldehydes and aliphatic, aromatic, and heteroaromatic primary or secondary amines, can be reduced with trichlorosilane in the presence of dimethylformamide (DMF) as an organocatalyst (≤10 mol %) in toluene or CH2Cl2 at room temperature. The reduction tolerates ketone carbonyls, esters, amides, nitriles, sulfones, sulfonamides, NO2
Mesoionic pyrido[1,2- a ]pyrimidinones: Discovery of triflumezopyrim as a potent hopper insecticide 1
作者:Wenming Zhang、Caleb W. Holyoke、Thomas F. Pahutski、George P. Lahm、James D. Barry、Daniel Cordova、Robert M. Leighty、Vineet Singh、Daniel R. Vicent、My-Hanh T. Tong、Kenneth A. Hughes、Stephen F. McCann、Yewande T. Henry、Ming Xu、Twyla A. Briddell
DOI:10.1016/j.bmcl.2016.11.042
日期:2017.1
A novel class of mesoionic pyrido[1,2-a]pyrimidinones has been discovered with exceptional insecticidal activity controlling a number of insect species. In this communication, we report the part of the optimization program which led to the discovery of triflumezopyrim as a highly potent insecticide controlling various hopper species. Our efforts in discovery, synthesis, structure-activity relationship
An Efficient Method for the Selective Iridium-Catalyzed Monoalkylation of (Hetero)aromatic Amines with Primary Alcohols
作者:Benoît Blank、Martyna Madalska、Rhett Kempe
DOI:10.1002/adsc.200700596
日期:2008.3.25
combination with reaction temperatures of 110 °C for the salt metathesis step. The reaction of two equivalents of a selected P,N ligand with one equivalent of the iridium complex [IrCl(cod)]2 (cod=1,5-cyclooctadiene) affords P,N ligand-coordinated iridium complexes in quantitative yield. X-Ray single crystal structure analysis of one of these complexes reveals a monomeric five-coordinated structure in