ACYLATED FLAVANOLS AND PROCYANIDINS FROM SALIX SIEBOLDIANA

Article abstract of DOI:10.1016/S0031-9422(00)83128-3

An homologous series of acylated flavan-3-ols and procyanidins have been isolated, together with the known procyanidins B-1, B-3 and trimer, from the bark of Salix sieboldiana.Chemical and spectroscopic evidence led to the assignments of their structures as the 3-O-(1,6-dihydroxy-2-cyclohexene-1-carboxylic acid ester) of (+)-catechin and the 1-hydroxy-6-oxo-2-cyclohexene carboxylic acid esters of (+)-catechin and procyanidins B-1, B-3 and trimer.Key Word Index - Salix sieboldiana; Salicaceae; bark; acylated flavan-3-ols; acylated procyanidins; 1-hydroxy-6-oxo-2-cyclohexene-1-carboxylic acid; 1,6-dihydroxy-2-cyclohexene-1-carboxylic acid .