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- W954886479 abstract "Since the late 1950s, PMR spectroscopy has contributed immensely to many areas of the chemistry of alkaloids. With the advent of Fourier transform spectrometers, CMR has rapidly approached the level of PMR in its application to problems of structural elucidation and stereochemistry. In the case of the alkaloids, many classes of the isoquinoline family have been studied. These alkaloids are of particular interest not only because of their widespread occurrence in nature, but also because of their pharmacological activity. Wenkert and others were the first to review progress in this area. More recently, Shamma and Hindenlang have made an extensive compilation of chemical shift data on amines and alkaloids that includes many examples from the isoquinoline group. The chapter has extended these reviews to cover the literature to mid-1979. There are selected examples in the chapter that are characteristic of a particular structural feature within a given class. It has attempted to show where novel experimental techniques have been used to advantage in the assignment of chemical shifts, and it has been tried to show how the chemical shift of a particular carbon atom may be influenced by change in functionality, substitution, or stereochemistry at neighboring centers. The chapter also emphasizes the value of this technique in differentiating among diastereomers and conformational isomers and its utility in structural elucidation." @default.
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- W954886479 date "1981-01-01" @default.
- W954886479 modified "2023-09-25" @default.
- W954886479 title "Chapter 3 The 13C-Nmr Spectra of Isoquiinoline Alkaloids" @default.
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- W954886479 doi "https://doi.org/10.1016/s1876-0813(08)60238-9" @default.
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