The borrowing hydrogen strategy has been applied in the synthesis of nonsymmetric N,N-dialkylated acyl hydrazides via a tandemthree-componentreaction catalyzed by a phosphine free diaminocyclopentadienone ruthenium tricarbonyl complex. This strategy represents the first direct one-pot approach to nonsymmetric functionalized acyl hydrazides. Different aromatic acyl hydrazides underwent dialkylation
Ruthenium-Catalyzed Synthesis of Highly Substituted Pyrroles from 1-Vinylpropargyl Alcohols and Amines
作者:Nora Thies、Martin Gerlach、Edgar Haak
DOI:10.1002/ejoc.201300803
日期:2013.11
Ruthenium-catalyzed atom-economic transformations of 1-vinylpropargyl alcohols with amines leading to highlysubstituted pyrroles in a one-pot cascade process are reported. The allylation/cycloisomerization sequence is catalyzed by a single ruthenium(0) complex that contains a redox-coupled dienone ligand and can be extended by an additional [3,3] rearrangement. The environmentally benign reactions
Herein, we report a diaminocyclopentadienone ruthenium tricarbonyl complex-catalyzed synthesis of mono- or dialkylated acyl hydrazide compounds using the borrowing hydrogen strategy in the presence of various substituted primary and secondary alcohols as alkylating reagents. Deuterium labeling experiments confirm that the alcohols were the hydride source in this cascade process. Density functional
Ruthenium-Catalyzed Synthesis of 2,3-Cyclo[3]dendralenes and Complex Polycycles from Propargyl Alcohols
作者:Nora Thies、Edgar Haak
DOI:10.1002/anie.201412207
日期:2015.3.23
of 2,3‐cyclo[3]dendralenes and multicomponent processes based thereon to generate complex polycycles are presented. The combination of allylation–cyclization sequences with diene‐transmissive Diels–Alder reactions allows the rapid and selective construction of natural‐product‐like motifs from easily accessible starting materials in a one‐pot process and provides a new method to access potential drug