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