Phytochemistry p. 3911 - 3918 (1990)
Update date:2022-08-02
Topics:
Conserva, Lucia M.
Yoshida, Massayoshi
Gottlieb, Otto R.
Martinez V., Juan C.
Gottlieb, Hugo E.
Iryanthera laevis, I. ulei and I. paraensis contain a series of novel lignoflavonoids the formation of which can be rationalized by the cinnamylation of the phloroglucinol type A-ring of a dihydrochalcone.The lignoid attachments of the flavonoid moieties consist of an arylvinylmethyl group in iryantherin-A, of 1,4-diaryl-2,3-dimethyl-n-butyl groups in iryantherins B and C and of 3-aryl-2-cinnamyl-n-propyl groups in iryantherins D and E.The construction of iryantherin-F requires oxidative addition of the vinyl unit of an iryantherin-A type compound to the A-ring of a second dihydrochalcone moiety.
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