Palladium(0)-Catalyzed Coupling of Organozinc Iodide Reagents with Bromopyridines: Synthesis of Selectively Protected Pyridine-Containing Azamacrocycles
摘要:
The synthesis of azamacrocycles in which the ring nitrogens are regioselectively functionalized is described. An organozinc palladium(0)-catalyzed coupling with an appropriately functionalized bromopyridine generated a key intermediate, which was transformed in two steps to a desired precursor and subjected to an intramolecular N-alkylation to effect a macrocyclization affording selectively protected azamacrocycles 1-3.
Palladium(0)-Catalyzed Coupling of Organozinc Iodide Reagents with Bromopyridines: Synthesis of Selectively Protected Pyridine-Containing Azamacrocycles
摘要:
The synthesis of azamacrocycles in which the ring nitrogens are regioselectively functionalized is described. An organozinc palladium(0)-catalyzed coupling with an appropriately functionalized bromopyridine generated a key intermediate, which was transformed in two steps to a desired precursor and subjected to an intramolecular N-alkylation to effect a macrocyclization affording selectively protected azamacrocycles 1-3.