Of sanggenon

Among the most intensively investigated of all the chalcone Diels Alder adducts are a group obtained solely from Morus species in which the diene component of the reaction is a dehydroprenylflavanone. The structures of several such compounds published prior to 1992 have now been revised on the basis of new spectroscopic and chemical data. Among the most important of the techniques used were two-dimensional NMR and circular dichroism spectroscopy. The revised structures listed in Table 16.5 are those of sanggenons C (210), D (211), E (212), and O (213). In these compounds, the flavanones show the common feature... 

Shi, Y.-Q., Fukai, T., and Nomura, T., Structure of sanggenon O, a Diels-Alder type adduct derived from a chalcone and a dehydroprenylated sanggenon-type flavanone from Morus cathayana, Heterocycles, 54, 639, 2001. 

Fukai, T. et al.. Structure of sanggenon G, a new Diels-Alder adduct from Chinese crude drug Sang-Bai-Pi Morus root bark). Heterocycles, 20, 611, 1983. 

Table 6. C-NMR Data of Sanggenons A (163), M (166) and Sanggenon A Trimethyl Ether (163 d)...

Comparison of the H-NMR spectra of sanggenon C (164), kuwanon G (25), and chalcomoracin (103), revealed that the chemical shifts and coupling constants of protons on the cyclohexene ring of 164 resembled those of 103 more closely than they did those of 25 (Figs. 28 and 45). In the C-NMR spectra (Table 7), the chemical shifts of... 

Nomura, T., T. Fukai, Y. Hano, and J. Uzawa Structure of Sanggenon C, a Natural Hypotensive Diels-Alder Adduct from Chinese Crude Drug Sang-Bai-Pi Morus Root Barks). Heterocycles 16, 2141 (1981). 

Hano, Y., M. Itoh, T. Fukai, T. Nomura, and S. Urano Constituents of the Cultivated Mulberry Tree XXVIII. Constituents of the Chinese Crude Drug Sang-Bai-Pi Morus Root Bark) VI. Revised Structure of Sanggenon B. Heterocycles 23, 1691 (1985). 

C30H3A M 504.579 Constit. of the root bark of Sorocea bonplandii (Moraceae). Amorph. powder, +34 (c, 0.1 in CHCI3). Isomer of Sanggenon L, S-00113. 

Nomura T, Fukai T, Hano Y, Uzawa J 1981 Structure of sanggenon C, a natural hypotensive Diels-Alder adduct from Chinese crude drug sang-bai-pi (morus root barks). Heterocycles 16 2141-2148... 

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