𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Confirmation of the Structures of Lutein and Zeaxanthin

✍ Scribed by Anthony Linden; Bruno Bürgi; Conrad Hans Eugster

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
272 KB
Volume
87
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A series of new esters of lutein (1a) have been prepared with the aim of confirming the structure of lutein via an X‐ray crystal‐structure analysis. Although well crystallized, only one of the derivatives, the (−)‐(1__R__)‐menthyl carbonate (1i) proved to be useful for a complete structure analysis. The same derivative of zeaxanthin (2a) also allowed its crystal structure to be determined. Both analyses represent the first successful X‐ray crystal structure analyses of the most important xanthophylls. At the same time, they confirm both the constitution and absolute configuration of 1a and 2a that had been deduced earlier by classical methods.

📜 SIMILAR VOLUMES

Photoreceptor-specific efficiencies of β
Photoreceptor-specific efficiencies of β-carotene, zeaxanthin and lutein for photopigment formation deduced from receptor mutantDrosophila melanogaster
✍ W. S. Stark; D. Schilly; J. S. Christianson; R. A. Bone; J. T. Landrum 📂 Article 📅 1990 🏛 Springer 🌐 English ⚖ 825 KB

Drosophila rearing media had only beta-carotene, zeaxanthin or lutein as precursors for photopigment chromophores. Zeaxanthin and lutein are potentially optimum sources of the 3-hydroxylated retinoids of visual and accessory photopigments. Mutants made the electroretinogram in white (w) eyes selecti