High-yield synthesis of a chiroporphyrin by hydrogen bond-directed cyclisation
作者:Céline Pérollier、Jacques Pécaut、René Ramasseul、Jean-Claude Marchon、Robert Bau
DOI:10.1039/a904134f
日期:——
A new chiroporphyrin is prepared in 60% yield using complementary intramolecular hydrogen-bonding interactions between N-acylurea substituents to direct the cyclisation of the tetrapyrrolic intermediate; similar hydrogen-bond assistance by carboxylic acid functions is suggested for cyclisation of hydroxymethylbilane to uroporphyrinogen I.