72963-60-1Relevant academic research and scientific papers
APPLICATION OF THE VILSMEIER FORMYLATION IN THE SYNTHESIS OF 11-(13)C LABELLED IRIDOIDS
Jensen, Soren Rosendal,Kirk, Ole,Nilsen, Bent Juhl
, p. 1949 - 1954 (2007/10/02)
The Vilsmeier reaction was utilized for the introduction of C-11 into iridoid glucosides, Aucubin hexaacetate (3a). 6,10-dideoxy aucubin tetraacetate (6a) and 8(S)-6,10-dideoxy-7,8-dihydro aucubin tetraacetate (7a) were used as substrates for the reaction. 6a and 7a were prepared by catalytic transfer hydrogenation of 3a with formic acid and Pd/C.The Vilsmeier reaction conditions were optimized with regard to the economic use of --DMF in the synthesis of -iridotrialglucoside (9).Remarcably, 5percent of the label in the product turned out to be situated at C-3.
Comparative Studies on the Constituents of a Parasitic Plant and Its Host. III. On the Constituents of Boschniakia rossica FEDTSCH, et FLEROV. (2)
Konishi, Tenji,Narumi, Yoko,Watanabe, Kazuaki,Kiyosawa, Shiu,Shoji, Junzo
, p. 4155 - 4161 (2007/10/02)
Two iridoid glucosides, namely boschnaloside (2), (+)-pinoresinol-β-D-glucopyranoside (3), a new oligosaccharide (=β-D-glucopyranosyl(1->4)-α-L-rhamnopyranosyl-(1->3)-D-(4-O-caffeoyl)-glucopyranose) (4), and a new phenylpropanoid glycoside named rossicaside A (5) have been isolated from Boschniakia rossica FEDTSCH, et FLEROV (Orobanchaceae) and their structures have been determined.Keywords--Boschniakia rossica; Orobanchaceae; boschnaloside; boschnaside; (+)-pinoresinol-β-D-glucoside; acetylated oligosaccharide; rossicaside A; phenylpropanoid glycoside
