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Volumn 17, Issue 3, 1978, Pages 499-502

13C NMR spectral analysis of lignans from Araucaria angustifolia

(4) Fonseca, Sebastião Ferreira a de Paiva Campello, Jayr a Barata, Lauro E S a Rúveda, Edmundo A a

Author keywords

13C NMR; Araucaria angustifolia; Araucariaceae; isolariciresinol; isolariciresinol dimethyl ether.; isolariciresinol 4 methyl ether; isolariciresinol 4 methyl ether; lariciresinol; lignans; secoisolariciresinol

Indexed keywords

EID: 0001031851 PISSN: 00319422 EISSN: None Source Type: Journal
DOI: 10.1016/S0031-9422(00)89347-4 Document Type: Article

Times cited : (154)

References (21)

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- The deshielding effects observed on C-9′ and C-9 by acetylation, although small (C-9′, Δδ = 66.4-66.2 = 0.2 ppm, C-9, Δδ = 63.4-6.26 = 0.8 ppm) are in agreement with the reported values for trans-4-t-butylcyclohexylmethanol acetate and trans-4-t-butylcyclohexylmethanol (carbinyl carbon Δδ = 69.3-68.9 = 0.4 ppm) [9].

14
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- We thank Professor H. Erdtman (Royal Institute of Technology, Stockholm) and Professor R. C. Cambie (University of Auckland) for generous gift of lariciresinol and matairesinol respectively.

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16
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- Acetylation of 6c to 6d, the same as 6e to 6f, shields C-4′ (Δδ = 6.2 ppm) and C-4 (Δδ = 0.7 ppm), but this effect is lower in the latter. Differences in shielding effects on acetylation were also observed in the transformation of 4a to 4b, (Δδ for C-4 = 5.2 ppm, Δδ for C-4′ = 3.7 ppm).

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18
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19
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.