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Melochia pyramidata

Melochinine (22) has been correlated with cassine (23) by transformation into the pyridine ketone (24), obtainable by dehydrogenation of cassine. It follows that the ring substituents in the two alkaloids have the same arrangement (Scheme 6).32 Other constituents of the leaves of Melochia pyramidata L. include melochinine D-glucoside and melochinone [the ketonic oxidation product of (22)].33... [Pg.42]

Melochinine, an alkaloid occurring in the leaves of Melochia pyramidata L., is the first representative of a hitherto unknown group of 4-pyridone bases. Spectroscopic analysis combined with microchemical degradation allows structure (47) to be advanced. ... [Pg.38]

Adouetine-Z (138) Feretia apodanthera (1), Melochia pyramidata (1), Waltheria americana (wh)... [Pg.155]

The carbocyclic ring is probably formed after the closure of the heterocyde, as suggested by the existence of the possible precursor analog melochininone (Scheme 18) from Melochia pyramidata (Sterculiaceae) (217,218). Cinnamoyl-CoA may be the starter unit of the polyketide chain, rather than acetyl-CoA, in... [Pg.183]

See other pages where Melochia pyramidata is mentioned: [Pg.96]    [Pg.171]    [Pg.546]    [Pg.96]    [Pg.171]    [Pg.546]    [Pg.157]   
See also in sourсe #XX -- [ Pg.182 ]

See also in sourсe #XX -- [ Pg.75 , Pg.96 , Pg.131 , Pg.155 , Pg.157 , Pg.161 ]

See also in sourсe #XX -- [ Pg.183 ]



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