Tetrahedron letters

A convenient method for conversion of flavonols into anthocyanins

M Elhabiri, P Figueiredo, A Fougerousse, R Brouillard

Index: Elhabiri, Mourad; Figueiredo, Paulo; Fougerousse, Andre; Brouillard, Raymond Tetrahedron Letters, 1995 , vol. 36, # 26 p. 4611 - 4614

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Citation Number: 27

Abstract

1 H NMR (400MHz, DMSO-d 6 -CF 3 CO 2 D/ ∗ : assigned by 1 H- 1 H COSY) δ ppm (J in Hz) (aglycone) 8.80 (1H, s, H4), 8.20 (1H, dd, J = 9; 2.1, H6′), 7.03 (1H, d, J = 9.1, H5′), 8.00 (1H, d, J = 2.0, H2′), 6.90 (1H, d, J = 2.0, H8), 6.78 (1H, d, J = 2.0, H6); (glucosyl) 5.26 (1H, d,J = 8, H1), 3.53 (1H, t, J = 7.5, H2 ∗ ), H3 not assigned, 3.48 (1H, m, H4 ∗ ), 3.17 (1H, m, H5 ∗ ), 3.42 (1H, dd, J = 10.6; 7.5, H6a ∗ ), 3.91 (1H, dd, J = 10.6; 7.5 H6b ∗ ...