1962
DOI: 10.1016/s0040-4039(00)70875-6
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Catalpa glycosides - II the structure of catalposide

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1964
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Cited by 12 publications
(15 citation statements)
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“…28−31 The characteristic NMR data for 1 were similar to those of 6-O-trans-feruloyl catalpol (3), which was also identified in the present study, 10 except for the presence of a trans-feruloyl group at C-10. Thus, the structure of 1 was defined as shown for the new compound, 13 C NMR spectra of 2 also showed resonances for a di-trans-feruloyl catalpol unit, as found for 1. However, in the 1 H NMR spectrum of 2, the methylene group protons at C-10 (δ H 3.71 and 4.21) of the iridoid skeleton were found upfield by 0.61 and 0.81 ppm, respectively, when compared with those of 1.…”
Section: ■ Results and Discussionmentioning
confidence: 67%
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“…28−31 The characteristic NMR data for 1 were similar to those of 6-O-trans-feruloyl catalpol (3), which was also identified in the present study, 10 except for the presence of a trans-feruloyl group at C-10. Thus, the structure of 1 was defined as shown for the new compound, 13 C NMR spectra of 2 also showed resonances for a di-trans-feruloyl catalpol unit, as found for 1. However, in the 1 H NMR spectrum of 2, the methylene group protons at C-10 (δ H 3.71 and 4.21) of the iridoid skeleton were found upfield by 0.61 and 0.81 ppm, respectively, when compared with those of 1.…”
Section: ■ Results and Discussionmentioning
confidence: 67%
“…Compound 10 was isolated as a light yellow, amorphous powder with a molecular formula of C 25 H 32 O 13 , based on its 13 C NMR data and the [M + Na] + ion at m/z 563.1729 (calcd 563.1735) in the HRESIMS. Compound 10 exhibited closely comparable 1 H and 13 C NMR data with 3, except for two methylene groups replacing the Δ 3,4 olefinic group. The methylene groups were observed at δ H 3.59 (1H, td, J = 12.4, 2.0 Hz) and 3.90 (1H, obscured due to signal overlapping)/δ C 62.9 (C-3), and 1.54 (1H, br d, J = 14.4 Hz) and 1.80 (1H, m)/24.0 (C-4).…”
Section: ■ Results and Discussionmentioning
confidence: 82%
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“…WysokiIiska and L. Swiatek (Photograph by Bugala 1991) The medicinal effect of Catalpa plants is mainly due to the iridoid glucosides (Kimura et al 1963;Suzuki et al 1991;Noro et al 1992). The structure of catalposide was established by Bobbitt et al (1961Bobbitt et al ( , 1962. The substance was classified as a glucoside and given the name catalpin.…”
Section: Secondary Compounds In Catalpamentioning
confidence: 99%