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.
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
Trifluoromethylated morpholines condensed with oxetane: Synthesis and transformations
作者:Alexander Yu. Rulev、Alexey R. Romanov、Evgeniy V. Kondrashov、Igor A. Ushakov、Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko
DOI:10.1016/j.jfluchem.2019.109366
日期:2019.11
• The treatment of fluorinated α-bromoenones with amino diols leads mainly to bicyclic compounds bearing condensed morpholine and oxetane rings. These derivatives undergo spontaneous isomerization into bis-oxazines when standing in a chloroform solution at room temperature.
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.