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
The stereoselective formation of highly substituted CF<sub>3</sub>-dihydropyrans as versatile building blocks
作者:Bjarke S. Donslund、Alicia Monleón、Jesper Larsen、Lise Ibsen、Karl Anker Jørgensen
DOI:10.1039/c5cc04874e
日期:——
The dienamine-mediated formal inverse electron demand hetero Diels–Alder reaction providing optically active 5-bromo-6-(trifluoromethyl)-3,4-dihydro-2H-pyrans is disclosed along with interesting transformations, affording a large variety of fully substituted dihydropyrans.
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.