Appending a Tris-imidazole Ligand with a Tyr244 Mimic on the Distal Face of Bromoacetamidoporphyrin
摘要:
Bromoacetamidoporphyrin is a convenient synthon for the attachment of distal superstructures at room temperature in good yields. New models are presented that contain a tris-imidazole distal ligand set bound to the porphyrin in either a binary or trinary fashion. More importantly, one distal imidazole is cross-linked to a phenol mimicking Tyr(244), making this model the closest structural analogue yet reported of the metal free cytochrome c oxidase (CcO) active site.
An Efficient Synthesis of 3-Substituted 3H-Pyrimidin-4-ones
摘要:
[GRAPHICS]A novel and practical synthesis of 3-substituted 3H-pyrimidin-4-ones is described. The key step involves the cyclization of enamide esters, derived from readily available beta-keto esters, with trimethylaluminum and various primary amines.