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
An iridiumcatalyst enables the reductive amination of carbonylgroups with unprecedented substrate scope, selectivity, and activity using formic acid as the hydrogen source (see scheme). The catalyst system provides significant improvement over commonly used boron hydrides.
Influence of cyclopropylethyl-containing amines and amides of the isoenzyme forms of rat liver aldehyde dehydrogenase
作者:K. L. Konoplitskaya、O. V. Kislova、E. G. Vinogradova、F. F. Shcherbina、A. V. Yazlovitskii、N. M. Khrinyuk、I. A. Ral'chuk
DOI:10.1007/bf02218943
日期:1994.1
substrate was maximally decreased after 6 h, and inhibition came to 54, 86, and 92% for the indicated doses. 1-Aminocyclopropanol had a similar effect on the acetaldehyde metabolism, but a more rapid inhibition of the enzyme With high affinity for the substrate was observed. To detect antialcohol activity, rats were given compounds structurally related to pargyline (N-methyl-N-propargylbenzylamine [12])
Implication of a Silyl Cobalt Dihydride Complex as a Useful Catalyst for the Hydrosilylation of Imines
作者:Cassandre C. Bories、Marion Barbazanges、Etienne Derat、Marc Petit
DOI:10.1021/acscatal.1c03886
日期:2021.11.19
Here, we describe the formation and use of silyl cobalt (III) dihydride complexes as powerful catalysts for the hydrosilylation of a variety of imines starting from a low-valent well-defined cobalt (I) complex. The reaction is efficient at low catalyst loadings with a diverse range of imines bearing various protecting groups, as well as aliphatic ketimines and quinoline. Kinetics, DFT calculations