Synthesis and evaluation of a novel series of 2,7-substituted-6-tetrazolyl-1,2,3,4-tetrahydroisoquinoline derivatives as selective peroxisome proliferator-activated receptor γ partial agonists
A novel series of 7-substituted-2-[3-(2-furyl)acryloyl]-6-tetrazolyl-1,2,3,4-tetrahydroisoquinoline derivatives were synthesized to clarify structure–activity relationships for peroxisome proliferator-activated receptor γ (PPARγ) partial agonist activity
ASYMMETRIC SYNTHESIS. PRACTICAL PRODUCTION OF D AND L THREONINE. DYNAMIC KINETIC RESOLUTION IN RHODIUM AND RUTHENIUM CATALYZED HYDROGENATION OF 2-ACYLAMINO-3-OXOBUTYRATES.
Enantioselective syntheses of D and L threonine are described.Racemic methyl and ethyl 2-acylamino-3-oxobutyrate 1 were synthesized from the corresponding acetoacetates 6 and then hydrogenated stereoselectively via dynamic kinetic resolution with various chiral P * P Rh(I) 8 and Ru(II) 10 catalysts to give syn optically active alcohols which could be converted by hydrolysis and treatment with propylene oxide into threonine.The best results were obtained using (-) CHIRAPHOS Ru and (+) BINAP Ru as catalysts, in the hydrogenation step leading respectively to D threonine (ee : 99percent) and L threonine (ee : 94percent) in 26-34percent overall yields.
Genet, J.P.,Pinel, C.,Mallart, S.,Juge, S.,Thorimbert, S.,Laffitte, J.A.
p. 555 - 567
(2007/10/02)
More Articles about upstream products of 136682-44-5