Manoharan, T. Samuel; Madyastha, K. Madhava; Singh, B. B., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 1, p. 5 - 11
13C Chemical shifts and conformational equilibria in quaternary piperidinium salts
摘要:
AbstractCarbon‐13 nuclear magnetic resonance spectra of a series of N‐methyl‐N‐alkylpiperidinium salts have been measured, and the observed chemical shifts analysed in terms of the stereochemical and conformational properties of the molecules. Furthermore, the differences of the free energy (ΔG°) between two conformers on ring inversion have been estimated.
A Convenient Method for Replacing the<i>N</i>-Methyl Group of Morphine, Codeine, and Thebaine by Other Alkyl Groups
作者:Thomas Samuel Manoharan、Kattigari Madhava Madyastha、Bajrang Bali Singh、Surendra P. Bhatnagar、Ulrich Weiss
DOI:10.1055/s-1983-30523
日期:——
13C Chemical shifts and conformational equilibria in quaternary piperidinium salts
作者:Makiko Sugiura、Narao Takao
DOI:10.1002/mrc.1270200110
日期:1982.9
AbstractCarbon‐13 nuclear magnetic resonance spectra of a series of N‐methyl‐N‐alkylpiperidinium salts have been measured, and the observed chemical shifts analysed in terms of the stereochemical and conformational properties of the molecules. Furthermore, the differences of the free energy (ΔG°) between two conformers on ring inversion have been estimated.
Sawa, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1944, vol. 64, p. 225,227
作者:Sawa
DOI:——
日期:——
Manoharan, T. Samuel; Madyastha, K. Madhava; Singh, B. B., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 1, p. 5 - 11
作者:Manoharan, T. Samuel、Madyastha, K. Madhava、Singh, B. B.、Bhatnagar, S. P.、Weiss, Ulrich