A NEW LIGAND SCAFFOLD (PY-PYRI) FOR THE META BORYLATION OF PHENOL DERIVATIVES
摘要:
The present invention discloses the meta borylation of TIPS protected phenol with a new type of ligand framework having pyridone moiety in the bipyridine core (PY- PYRI). This new ligand framework is highly reactive and afforded meta selective borylation of various substituted TIPS protected phenol and borylation reaction not affected by the substituents steric crowding. This invention provides an access to functionalize the meta positions of TIPS protected phenol with the new pyridine- pyridone ligand framework with [Ir(cod)OMe]2and B2pin2as a borylating agent in cyclohexane solvent.