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.