Efficient Pd-catalyzed coupling of tautomerizable heterocycles with terminal alkynes via C-OH bond activation using PyBrOP.

ABSTRACT: The direct alkynylation of tautomerizable heterocylcles is described via a two-step process involving in situ C-OH activation with bromotripyrrolidinophosphonium hexafluorophosphate (PyBrOP) followed by Sonogashira coupling with a wide range of alkyl or aryl terminal alkynes using a copper-free system employing PdCl(2)(CH(3)CN)(2) and 2-(dicyclohexylphosphino)biphenyl.

SUBMITTER: Shi C 

PROVIDER: S-EPMC2873160 | biostudies-literature | 2010 May

REPOSITORIES: biostudies-literature