Begley, Michael J.; Crombie, Leslie; Crombie, W. Mary L., Journal of the Chemical Society. Perkin transactions I, 1986, p. 1905 - 1916
作者:Begley, Michael J.、Crombie, Leslie、Crombie, W. Mary L.、Whiting, Donald A.
DOI:——
日期:——
Isolation of avenacins A–1, A–2, B–1, and B–2 from oat roots: structures of their ‘aglycones’, the avenestergenins
作者:Leslie Crombie、W. Mary L. Crombie、Donald A. Whiting
DOI:10.1039/c39840000244
日期:——
Four antifungal avenacins are isolated fromoatroots: the structures of their ‘aglycones’, avenestergeninsA–1, A–2, B–1, and B–2, are shown to be N-methylanthranilic or benzoic esters of an unusually oxygenated oleanane triterpene.
Structures of the four avenacins, oat root resistance factors to ‘take-all’ disease
作者:Leslie Crombie、W. Mary L. Crombie、Donald A. Whiting
DOI:10.1039/c39840000246
日期:——
The true aglycones of the avenacins are acid sensitive triterpene 12,13-epoxides, not 12-ketones, and one such avenestergenin epoxide is isolated direct fromoatroots; this, together with study of the attached trisaccharide, permits complete structures to be proposed for the four avenacins (3a—d); avenestergenins readily undergo an acid-catalysed anhydrodimerisation via acetal formation.