Force field and multinuclear nmr study of the conformational properties of thiolane-1-oxide and its mono and dimethyl derivatives
作者:G. Barbarella、S. Rossini、A. Bongini、V. Tugnoli
DOI:10.1016/s0040-4020(01)82365-6
日期:1985.1
mono and dimethyl derivatives. For comparison carbon-13 and oxygen-17 chemical shifts of the corresponding S-dioxides are also reported. According to force field calculations and NMR data the conformation of S-oxides depends on the number and on the position of ring substituents. Oxygen-17 chemical shifts of thiolane S-oxides are apparently not very sensitive to ring substitution and to the configuration
报告了硫烷S-氧化物及其几种单和二甲基衍生物的力场计算和1 H,13 C和17 O NMR数据。为了进行比较,还报道了相应的S-二氧化物的碳13和氧17的化学位移。根据力场计算和NMR数据,S-氧化物的构象取决于环取代基的数目和位置。硫烷S-氧化物的氧17化学位移显然对环取代和亚磺酰基的构型不是很敏感。但是,这是构象变化的结果,无法轻易预测。对于2-甲基衍生物δ 17 0允许容易识别的顺式和反式异构体的。