Preparations and reactions of 2-trifluoromethylketenimines
摘要:
Preparations and reactions of a series of 2-trifluoromethylketenimines are described. Trifluoromethylketenimines were prepared from trifluoropropanoic acids via corresponding imidoyl chlorides in good yields. 2-Trifluoromethylketenimine was functionalized at its beta-position by electrophilic addition of halide, followed by dehydrohalogenation. Addition of nucleophile at alpha-position gave trifluoroethylated beta-amino acid derivative via 1,3-proton shift. (C) 2009 Elsevier B.V. All rights reserved.
Compounds, pharmaceutically acceptable salts, stereoisomers and prodrugs thereof, that are ER ligands and particularly to such compounds that are ER beta-selective and/or ER beta-specific ligands. Compounds herein include certain compounds which are ER beta-selective agonists. Compounds herein include ER beta-selective agonists which exhibit minimal agonist or antagonist effect on ER alpha. Compounds of the invention include those of formula I:
and any pharmaceutically acceptable salts, stereoisomers and prodrugs thereof wherein AR, R
1
, R
3
, and X
1
—X
4
are as defined hereinabove.