2005
Hydroxycarboxylic acids (ether carboxylic acids) and esters
P 0280
Diastereo- and Enantio-Selective Crotylation of α-Ketoesters Using Crotyl BoroAcid Ester Complexes. — Chiral crotylborates react with ethyl pyruvate highly
06- 071 nic
diastereospecifically. By far, the best enantioselectivity is achieved with boronates (IV)
and (V) based on diisopropyl tartrate. — (CHEN, Y.; ELTEPU, L.; WENTWORTH*,
P. J.; Tetrahedron Lett. 45 (2004) 45, 8285-8288; Dep. Chem., Scripps Res. Inst., San
Diego, La Jolla, CA 92037, USA; Eng.) — Mais