67376-72-1Relevant academic research and scientific papers
Asymmetric syntheses of a GPR40 receptor agonist via diastereoselective and enantioselective conjugate alkynylation
Woo, Jacqueline C.S.,Cui, Sheng,Walker, Shawn D.,Faul, Margaret M.
experimental part, p. 4730 - 4737 (2010/08/06)
Two asymmetric methods to synthesize a potent GPR40 receptor agonist are reported. Both synthetic routes utilize readily available, inexpensive starting materials and reagents. The first route relies on a highly diastereoselective conjugate alkynylation of an ephedrine-derived oxazepanedione acceptor. The second route features the enantioselective alkynylation of a Meldrum's acid-derived acceptor mediated by a chiral zinc cinchonidine reagent.
A SHORT EFFECTIVE PREPARATION OF CHIRAL N,3-DIMETHYL-5,7-DIOXO-2-PHENYLHEXAHYDRO-1,4-OXAZEPINES
Brown, Richard T.,Ford, Mark J.
, p. 1801 - 1806 (2007/10/02)
An improved two-stage procedure has been devised for the synthesis in 50percent yield of the title compounds from ephedrine or pseudoephedrine enantiomers and dimethyl malonate using cyanuric chloride/pyridine to lactonise the intermediate ε-hydroxyacids.
