Biomimetic Reductive Amination of Fluoro Aldehydes and Ketones <i>via</i> [1,3]-Proton Shift Reaction.<sup>1</sup> Scope and Limitations
作者:Taizo Ono、Valery P. Kukhar、Vadim A. Soloshonok
DOI:10.1021/jo960503g
日期:1996.1.1
proceed essentially (>98%) intramolecularly with isotope exchange experiments. High chemical yields, the simplicity of the experimental procedure, and the low cost of all reagents employed make this biomimetic transamination of fluorocarbonyl compounds a practical method for preparing fluorine-containing amines of biological interest.
Preparation of 3-(Fluoroalkyl)-2-azadienes and Its Application in the Synthesis of (Fluoroalkyl)isoquinoline and -pyridine Derivatives
作者:Francisco Palacios、Concepción Alonso、Marta Rodríguez、Eduardo Martínez de Marigorta、Gloria Rubiales
DOI:10.1002/ejoc.200400770
日期:2005.5
A method for the preparation of 3-(fluoroalkyl)-substituted 2-azabutadienes 5 by aza-Wittig reaction of N-vinylic 3-(fluoroalkyl)phosphazenes 4 and aldehydes is reported. Thermal 6π-electrocyclization of these azadienes gives 3-(fluoroalkyl)-substituted isoquinolines 6. Also [4+2] cycloaddition of these heterodienes 5 with enamine 8 gives fluoroalkyl-substituted pyridine derivatives 10–16. However,