Stereoselective synthesis and stereochemistry of <i>r</i>-2-alkoxycarbonyl-<i>c</i>-3-<i>o</i>-substituted phenyl-1,4-thiazane 1,1-dioxides
作者:N Bhavani、S Perumal、R Banureka
DOI:10.1139/v05-020
日期:2005.3.1
benzaldehydes gave a trans product. The relative configuration of the adjacent alkoxycarbonyl and aryl groups was assigned from the vicinalcoupling constant, 3J = 10.6 Hz in the transisomer and 3.2 Hz in the cisisomer, and from the multiplicity pattern, i.e., a doublet for the H-2 proton of the transisomer and a triplet for the H-2 proton of the cisisomer. The unusual, large long-range coupling (4J = 2.8