Nitrogen bridgehead compounds. 62. Conformational analysis of 6, 7, 8, 9-tetrahydro-4H-pyrido [1, 2-a] pyrimidin-4-ones and their methyl derivatives by NMR …

…, I Hermecz, L Vasvari-Debreczy…

文献索引：Podanyi, Benjamin; Hermecz, Istvan; Vasvari-Debreczy, Lelle; Horvath, Agnes Journal of Organic Chemistry, 1986 , vol. 51, # 3 p. 394 - 399

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被引用次数: 14

摘要

Proton and carbon-13 chemical shift data have been acquired for 2 6, 7, 8, 9-tetrahydro-4H- pyrido [1, 2-a] pyrimidin-4-ones and 20 methylated derivatives. Least-squares regression analysis has been undertaken on the aliphatic ring carbons of compounds with unequivocal conformations to determine the methyl substituent parameters for the four distinct aliphatic positions, and the results have been used to estimate the position of equilibrium of ...