Multichannel Reaction of α-Bromoenones with 1,2-Diamines: Synthesis of 1,4-Diazabicyclo[4.1.0]hept-4-enes by Reaction with<i>N</i>-Unsubstituted 1,2-Diamines
作者:Vasily M. Muzalevskiy、Alexander Yu. Rulev、Evgeniy V. Kondrashov、Alexey R. Romanov、Igor A. Ushakov、Vyacheslav A. Chertkov、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201501584
日期:2016.3
The reaction of 2-bromoenones with N-unsubstituted 1,2-diamines was studied. An easy access to 1,4-diazabicyclo[4.1.0]hept-4-enes was developed. The multistep mechanism of the reaction is discussed. Final conclusions on the influence of the structure of the starting 2-bromoenones and 1,2-diamines on the direction of the reaction are established.
Reactions of CF3-Haloenones with 1,3-Dicarbonyl Compounds: Chemo- and Stereoselective Assembly of Fluorinated Dihydrofurans
作者:Alexander V. Popov、Alexander V. Mareev、Valentina A. Kobelevskaya、Sergei V. Zinchenko、Alexander V. Vashchenko、Alexander Yu. Rulev
DOI:10.1016/j.jfluchem.2021.109819
日期:2021.8
3-diketones and β-keto esters). The reaction was generally found to proceed in moderate to good yield and excellent selectivity. The mechanism of the assembly of these heterocycles is discussed in terms of multi-step processes involving formation of Michael adduct followed by cyclization through the classical intramolecular halogen nucleophilic substitution at sp3carbon atom.
Assembly of Trifluoromethylated Morpholines through Cascade Reactions of Bromoenones with Secondary Amino Alcohols
作者:Alexander Yu. Rulev、Alexey R. Romanov、Evgeniy V. Kondrashov、Igor A. Ushakov、Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201800659
日期:2018.8.15
synthesis of trifluoromethylated morpholinols and previously unknown bicyclic compounds containing fused morpholine and oxetane rings is reported. The method involves the dominoreaction of fluorinated α‐bromoenones with secondary amino alcohols. The one‐pot assembly of both heterocyclic systems is initiated by an aza‐Michael reaction followed by intra‐ or intermolecular bromide substitution and cyclization
Domino Assembly of Trifluoromethylated N,O-Heterocycles by the Reaction of Fluorinated α-Bromoenones with Amino Alcohols
作者:Alexander Yu. Rulev、Alexey R. Romanov、Evgeniy V. Kondrashov、Igor A. Ushakov、Alexander V. Vashchenko、Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko
DOI:10.1021/acs.joc.6b01927
日期:2016.10.21
A highly efficient method for the selective synthesis of trifluoromethylated morpholines (4-oxa-1-azabicyclo[4.1.0]heptanes) and so far unknown 1,4-oxazepanes (2,8-dioxa-5-azabicyclo[5.1.0]octanes) based on a domino reaction of fluorinated α-bromoenones with β-amino alcohols was elaborated. The assembly of both heterocyclic systems is initiated by an aza-Michael reaction followed by intramolecular
Reaction of α-Bromo Enones with 1,2-Diamines. Cascade Assembly of 3-(Trifluoromethyl)piperazin-2-ones via Rearrangement
作者:Alexander Yu. Rulev、Vasiliy M. Muzalevskiy、Evgeniy V. Kondrashov、Igor A. Ushakov、Alexey R. Romanov、Victor N. Khrustalev、Valentine G. Nenajdenko
DOI:10.1021/ol401041f
日期:2013.6.7
A facile one-pot synthesis of 3-trifluoromethylated piperazin-2-ones has been achieved by the treatment of trifluoromethyl 2-bromo enones with N,N'-disubstituted ethylenediamines in trifluoroethanol. The mechanism of this unexpected reaction is discussed in terms of multistep processes involving formation of captodative aminoenone as a key intermediate. The unique influence of trifluoromethyl group on the reaction path was demonstrated.