A convenient synthetic route to polypyridine-esters by palladium-promoted carboalkoxylation
作者:Abdelkrim El-ghayoury、Raymond Ziessel
DOI:10.1016/s0040-4039(98)00820-x
日期:1998.6
smoothly with CO (1 atm) and n-butanol in the presence of a tertiary amine and a catalytic amount of bis(triphenylphosphine)palladiumdichloride to afford the corresponding esters. When ethanol and a disubstituted substrate are used under milder conditions, selective mono-carboalkoxylation occurs. Amidation is effected using a primaryamine as nucleophile.
Facile Synthesis of Polypyridine Esters: A Route to Functionalized Aldehydes
作者:Abdelkrim El-ghayoury、Raymond Ziessel
DOI:10.1021/jo000635g
日期:2000.11.1
synthesized and fully characterized. The principal reaction involves the palladium(0)-catalyzed carboalkoxylation of the bromo-, chloro- or triflate-substituted pyridine unit with carbon monoxide in the presence of a primary alcohol as nucleophile and a tertiary amine as base. Monofunctionalization of disubstituted compounds is realized by reaction in ethanol under mild conditions (70 degrees C, 1 atm