Colloidal and Nanosized Catalysts in Organic Synthesis: XX. Continuous Hydrogenation of Imines and Enamines Catalyzed by Nickel Nanoparticles
摘要:
Nickel nanoparticles on the BAU-A active carbon or NaX zeolite catalyze hydrogenation of imines and enamines in a flow reactor in a gas phase or in a gas-liquid-solid catalyst system. The process occurs at atmospheric pressure of hydrogen and gives secondary or tertiary amines in a high yield.
[EN] NOVEL PIPERIDINE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE PIPÉRIDINE
申请人:HOFFMANN LA ROCHE
公开号:WO2016087352A1
公开(公告)日:2016-06-09
The invention relates to a compound of formula (I) wherein A1, A2 and R1to R3 are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.
Reaction of enamines with benzylidene ketones. Part II.
作者:J. W. Lewis、P. L. Myers、J. A. Ormerod、I. A. Selby
DOI:10.1039/p19720001549
日期:——
between cyclohexanone enamines and a variety of benzylidene ketones gives a dihydropyran derivative in each case. The benzopyrans from reactions of 1 -piperidinocyclohexene with chalcone and with dibenzylideneacetone are unstable and on heating readily rearrange into isomeric enamino-ketones (6) and (10). Recyclisation of 2-phenyl-2-(2-piperidinocyclohex-2-enyl)ethyl styryl ketone (10) gives 1,4-diph
在每种情况下,环己酮烯胺与各种亚苄基酮之间的反应都会生成二氢吡喃衍生物。1-哌啶子基环己烯与查尔酮和二亚苄基丙酮的反应生成的苯并吡喃不稳定,在加热时容易重排为异构的烯氨基酮(6)和(10)。2-苯基-2-(2- piperidinocyclohex -2-烯基)乙基苯乙烯基酮(10)的Recyclisation给出1,4-二苯基7B-piperidinoperhydrocyclobuta [ DE ]萘-2-酮(11)。
Application of cation-π interactions in enzyme-substrate binding: Design, synthesis, biological evaluation, and molecular dynamics insights of novel hydrophilic substrates for NQO1
Cation-π interaction is a type of noncovalent interaction formed between the π-electron system and the positively charged ion or moieties. In this study, we designed a series of novel NQO1 substrates by introducing aliphatic nitrogen-containing side chains to fit with the L-shaped pocket of NQO1 by the formation of cation-π interactions. Molecular dynamics (MD) simulation indicated that the basic N
A facile three-step total synthesis of tanshinone I
作者:Han-Rui Yang、Jie-Jie Wang、Peng-Peng Shao、Si-Yi Yuan、Xu-Qin Li
DOI:10.1080/10286020.2015.1136906
日期:2016.7.2
A facilesynthetic approach for total synthesis of tanshinone I has been accomplished. The key precursor is a novel compound, epoxy phenanthraquinone. And this synthesis of tanshinone I is achieved in only three simple stages, which include Diels–Alder reaction, Δ2-Weitz–Scheffer-type epoxidation, and Feist–Bénary reaction from commercially available styrene.
Synthesis of Chromone-Containing Allylmorpholines through a Morita-Baylis-Hillman-Type Reaction
作者:Nikita M. Chernov、Roman V. Shutov、Oleg I. Barygin、Mikhail Y. Dron、Galina L. Starova、Nikolay N. Kuz'mich、Igor P. Yakovlev
DOI:10.1002/ejoc.201801159
日期:2018.12.6
An unusual addition of enamines to chromone‐substituted acrylic acid is an efficient and versatile method of synthesis of allylamine derivatives. The reaction is catalyzed by amines and is highly likely of Morita–Baylis–Hillman‐type. The described compounds show combined moderate inhibitory action on BChE and antagonism towards NMDA receptors