COMPLETE 1H AND 13C CHEMICAL SHIFTS ASSIGNMENTS AND THE RELATIONSHIP BETWEEN 13C CHEMICAL SHIFTS AND STEREOCHEMISTRY FOR β-DIHYDROAGAROFURAN SESQUITERPENE

Chinese Journal of Magnetic Resonance ›› 1992, Vol. 9 ›› Issue (4): 329-335.

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COMPLETE ¹H AND ¹³C CHEMICAL SHIFTS ASSIGNMENTS AND THE RELATIONSHIP BETWEEN ¹³C CHEMICAL SHIFTS AND STEREOCHEMISTRY FOR β-DIHYDROAGAROFURAN SESQUITERPENE

Tu Yongqiang, Wang Yanhong

Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R. China

Received:1991-11-25 Revised:1992-03-30 Published:1992-12-05 Online:2018-01-20

Abstract

Abstract: Complete ¹H and ¹³C chemical shifts assignments of three kinds of b-dihydroagarofuran sesquiterpcnoids (1-3) were carried out on the basis of ¹H, ¹³C-COSY and ¹H, ¹³C long-range COSY(COLOC) spectra. An exact examination and comparison of the relationship between the ¹³C chemical shifts for C-14 and the stereochemistry at C-8 and C-9 for these compounds, as well as nineteen other various β-dihydroagarofuran compounds, have led to a new and very important means of conformational characterization.

Key words: ¹H and ¹³C chemical shifts, 2D NMR, β-dihydroagarofuran sesquiterpenoids, Stereochemistry

Tu Yongqiang, Wang Yanhong. COMPLETE ¹H AND ¹³C CHEMICAL SHIFTS ASSIGNMENTS AND THE RELATIONSHIP BETWEEN ¹³C CHEMICAL SHIFTS AND STEREOCHEMISTRY FOR β-DIHYDROAGAROFURAN SESQUITERPENE[J]. Chinese Journal of Magnetic Resonance, 1992, 9(4): 329-335.

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COMPLETE ¹H AND ¹³C CHEMICAL SHIFTS ASSIGNMENTS AND THE RELATIONSHIP BETWEEN ¹³C CHEMICAL SHIFTS AND STEREOCHEMISTRY FOR β-DIHYDROAGAROFURAN SESQUITERPENE

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