Carbon-13 chemical shift assignment of alkoxycarbonylalkylthiouracils and 3-oxothiazolo[3,2-a(or -c)]pyrimidin-5-ones
作者:ElżBieta Wyrzykiewicz、Jadwiga Wybieralska
DOI:10.1002/mrc.1260250619
日期:1987.6
The 13C NMR spectra of sixteen isomeric 2-and 4-alkoxycarbonylalkylthiouracils, eightnew 2,4-dialkoxycarbonylalkylthiouracils and eight isomeric 3-oxothiazolo[3,2-a]-and 3-oxothiazolo[3,2-c]-pyrimidin-5-ones have been calculated and fullyassigned. The AiK empirical parameters of the 2-thio, 4-thio, 6-methy1, 2-alkoxycarbonylalkylthio, 4-alkoxycarbonylalkylthio, P-alkoxycar-bonylalkyl, 4-alkoxycarbonylalkyl, N-3-carbonylalkylthio-2-, N-3-carbonylalkylthio-4, N-3-carbonylalkyl-2-thio and N-3-carbonylalkyl-4-thio groups were calculated for the predictions of the chemical shifts of substituted uracils.
对 16 种 2-和 4-烷氧羰基烷基硫脲异构体、8 种新的 2,4-二烷氧羰基烷基硫脲和 8 种 3-氧噻唑并[3,2-a]-和 3-氧噻唑并[3,2-c]-嘧啶-5-酮异构体的 13C NMR 光谱进行了计算和完全赋值。计算了 2-硫代、4-硫代、6-甲基1、2-烷氧羰基烷硫基、4-烷氧羰基烷硫基、P-烷氧羰基烷基、4-烷氧羰基烷基、N-3-羰基烷硫基-2-、N-3-羰基烷硫基-4-、N-3-羰基烷硫基-2-和 N-3-羰基烷硫基-4-硫基的 AiK 经验参数,以预测取代尿嘧啶的化学位移。