Regioselectivity Issues in the Addition of Grignard Reagents to Trifluoromethylated α-Bromoenones
作者:Alexey R. Romanov、Dominique Cahard、Alexander Yu. Rulev
DOI:10.1002/ejoc.201900155
日期:2019.3.21
α‐bromoenones their fluorinated analogs react with alkyl and arylmagnesium bromides leading to saturated CF3‐ketones as major reaction adducts. The regioselectivity of addition depends strongly on the nature of the Grignardreagent.
Reaction of Bromoenones with Amidines: A Simple Catalyst-Free Approach to Trifluoromethylated Pyrimidines
作者:Alexander Yu. Rulev、Alexey R. Romanov、Alexander V. Popov、Evgeniy V. Kondrashov、Sergey V. Zinchenko
DOI:10.1055/s-0040-1707969
日期:2020.5
one-pot synthesis of trifluoromethylated pyrimidines has been achieved by the treatment of fluorinated 2-bromoenones with aryl- and alkylamidines. The assembly of pyrimidine core proceeds by the cascade reactions via aza-Michael addition–intramolecular cyclization–dehydrohalogenation/dehydration sequence. This strategy is featured by high selectivity and mild reaction conditions giving the target heterocycles
Domino Transformations of<i>gem-</i>Trifluoroacetyl(bromo)alkenes under the Action of Secondary Amines
作者:Alexander Yu. Rulev、Igor A. Uchakov、Valentin G. Nenajdenko、Elisabeth S. Balenkova、Mikhail G. Voronkov
DOI:10.1002/ejoc.200700606
日期:2007.12
underwent aza-Michael/hydroxyalkylation domino reactions triggered by secondaryamines to give unexpectedly 2-amino-1-trifluoromethyl indenols in good yields. The process was found to involve the intermediate formation of captodative aminoalkenes. Treatment of 2-bromo-3-thienyl derivatives with the same nucleophiles afforded the captodative trifluoroacetyl(amino)alkenes. The indenols obtained in this reaction
One-pot synthesis of functionalized indenols from 2-bromoalkenyl trifluoromethyl ketones
作者:Alexander Yu. Rulev、Igor A. Ushakov、Valentin G. Nenajdenko
DOI:10.1016/j.tet.2008.06.069
日期:2008.8
one-pot synthesis of indenols was successfully realized starting from 3-aryl-2-bromopropenyl trifluoromethyl ketones and secondary amines. The synthesis proceeds through domino reactions including captodative aminoenones as a key intermediate. When bromoenones having a donor substituent in meta-position of the aromatic ring were subjected to this reaction, the mixture of two isomeric indenols was formed