<i>Trans</i>-Stereoselectivity in the Reaction between Homophthalic Anhydride and Imines
作者:Yosu Vara、Tamara Bello、Eneko Aldaba、Ana Arrieta、José L. Pizarro、María I. Arriortua、Xabier Lopez、Fernando P. Cossío
DOI:10.1021/ol801757r
日期:2008.11.6
The reaction between homophthalicanhydride and imines in the presence of TiCl4 and diisopropyl ethyl amine is trans-selective. Under these conditions, the reaction using homochiral imines can be highly diastereoselective, thus allowing the synthesis of enantiopure 1,2,3,4-tetrahydro-1-oxoquinoline-4-carboxylic acids.
A study and mechanistic interpretation of the electronic and steric effects that determine the stereochemical outcome of the reaction of Schiff bases with homophthalic anhydride and 3-phenylsuccinic anhydride