339557-52-7Relevant academic research and scientific papers
Parallel synthesis of novel heteroaromatic acromelic acid analogues from kainic acid
Baldwin,Fryer,Pritchardt
, p. 2588 - 2596 (2007/10/03)
A range of new C-4 heteroaromatic acromelic acid analogues has been synthesized in a parallel fashion from (-)-α-kainic acid 1. Protection of the amine and carboxylate groups of 1 followed by ozonolysis gave methyl ketone 8. A silyl enol ether 9, generated regiospecifically from the methyl ketone 8 using "kinetic" conditions, was brominated in situ with phenyltrimethylammonium perbromide to give the key α-bromo ketone 10. Parallel cyclization reactions of bromo ketone 10 with thioamides and thioureas were then performed. The aromatic heterocyclic derivatives 11a-d and 19 produced were deprotected to give the new kainoid amino acids 6a-d and 25 in excellent yield. Compounds 6a and 6c show strong binding to the kainate receptor. Reaction of 10 with alternative condensing agents was also briefly investigated.
