ChemInform Abstract: SYNTHESIS AND PROTON NMR STUDY OF THE FOUR UNBRANCHED PERACETYL‐β‐D‐GLUCOPYRANOSYL‐β‐GENTIOBIOSES

Abstract

Im Hinblick auf die Strukturaufklärung eines unbe‐ kannten Trisaccharids, das aus den Stempeln des Garten‐Krokus (Crocus neapolitanus var.) isoliert worden ist, werden aus Acetobrom‐gentiobiose (Ia), ‐cellobiose (Ib), ‐laminaribiose (Ic) bzw. ‐sophorose (Id) mit der Komponente (II) die vier unverzweigten β‐D‐Glucopyranosyl‐β‐gentiobiose‐peracetate (III) synthetisiert.

Isolation and Structure Elucidation of Carotenoid−Glycosyl Esters in Gardenia Fruits (Gardenia jasminoides Ellis) and Saffron (Crocus sativus Linne)

“…For supplementary information a T-ROESY experiment (Hwang and Shaka, 1992) was performed. Cross-peaks were found between the following proton signals: The proof of the C6fC1 connection between the sugar moieties is the following: the proton(s) of the C-atom to which the anomeric C-atom is bound must exhibit a shift to higher field (Rychener et al, 1984). This is the case for A6.1 and A6.2.…”