Funcionalización selectiva de enlaces c(sp3)–h alifáticos usando amidas como grupos directores y sistemas reactivos basados en yodo hipervalente/yodoformación de enlaces c–n mediante transferencia intramolecular de átomos de hidrógeno

  1. Rodríguez Sosa, Dionisio José
Dirigida por:
  1. Concepcion del Carmen Gonzalez Martin Director/a
  2. Antonio Jesús Herrera González Codirector/a
  3. Francisco Cosme García Codirector/a

Universidad de defensa: Universidad de La Laguna

Fecha de defensa: 07 de junio de 2016

Tribunal:
  1. Víctor Sotero Martín García Presidente/a
  2. Victor Manuel Rayon Rico Secretario
  3. Massimo Bietti Vocal

Tipo: Tesis

Teseo: 417493 DIALNET lock_openRIULL editor

Resumen

Throughout this thesis it is described our research on the functionalization of unactivated C(sp3)-H bonds, mainly from methyl groups, in nonconstrained molecules, to create new C(sp3)-N and C(sp3)-Br bonds. They were conducted through 1,5 hydrogen atom transference to nitrogen centered radicals, generated by treatment with the reactive systems PhI(OAc)2/I2 or PhI(OAc)2/Br2 under irradiation of several precursors such as sulfonamides, cyclic sulfamates and cyclic sulfamides. All these precursors allowed the regio- and chemoselective synthesis of pyrrolidines, g-lactams and cyclic imines. The mechanisms of the functionalizations and the oxidation to imines were also investigated in order to improve the chemoselectivity. The evidence obtained let us propose a mechanistic pathway to explain the formation of each product.