Zhang, Shasha;Sun, Xiaoyun;Liu, Daicheng published 《Preparation of (3R, 3’R)-astaxanthin monoester and (3R, 3’R)-astaxanthin from Antarctic krill (Euphausia superba Dana)》. The research results were published in《European Food Research and Technology》 in 2015.Formula: C10H13ClO3 The article conveys some information:
A special method is described for the preparation of (3R, 3’R)-astaxanthin monoester (AM) and (3R, 3’R)-astaxanthin from Antarctic krill (Euphausia superba Dana). Purified AM was obtained on a large scale from crude extract extracted from Antarctic krill in 38.14 % yield by silica gel column chromatog. After the AM was saponified with methanolic KOH (0.10 mol L-1) and separated by high-performance thin-layer chromatog., pure astaxanthin was obtained. There was only one optical (3R, 3’R)-isomer of the esterification of astaxanthin with (-)-camphanic acid chloride detected by high-performance liquid chromatog. compared with astaxanthin standard It was further proved that the AM consists of only one optical (3R, 3’R)-isomer. Twelve types of fatty acids in the AM from Antarctic krill were found by gas chromatog.-mass spectrometer. Eicosapentaenoic and docosahexaenoic acids are the major fatty acids. It is the first time to prepare (3R, 3’R)-AM and (3R, 3’R)-astaxanthin from Antarctic krill. The purified (3R, 3’R)-AM and (3R, 3’R)-astaxanthin can be used as a standard for further related study.(1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets) (cas: 39637-74-6) were involved in the experimental procedure.
(1S)-4,7,7-Trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carbonyl chloride(Chunks or pellets) (cas: 39637-74-6 Formula: C10H13ClO3) is a chiral derivatizing agent. It can be prepared by reacting (-)-(1S,4R)-camphanic acid with thionyl chloride.
Reference:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics