Stereoselective Michael Addition of Thiophenols, Amino Acids and Hydrazoic Acid to (2S)-Hydroxymethyl-dihydropyridone as a Convenient Route to Novel Azasugar Derivatives
作者:Sofia D. Koulocheri、Prokopios Magiatis、Alexios-Leandros Skaltsounis、Serkos A. Haroutounian
DOI:10.1016/s0040-4020(00)00563-9
日期:2000.8
The outcome and stereochemical aspects of 1,4-conjugate addition of thiophenols, α-aminoacid derivatives and hydrazoic acid to chiral (2S)-hydroxymethyl-dihydropyridone 3 is presented. Subsequent reduction with NaBH4 provided predominantly the kinetically favored axial 3-piperidinol adducts. The stereochemistry of the products, which depends on electrostatic interaction and steric hindrance, was revealed
介绍了在手性(2 S)-羟甲基-二氢吡啶酮3中添加1,4-共轭苯酚,α-氨基酸衍生物和肼酸的结果和立体化学方面。随后用NaBH 4还原主要提供了动力学上有利的轴向3-哌啶醇加合物。通过1 H NMR和2D NOESY光谱分析揭示了取决于静电相互作用和空间位阻的产物的立体化学。