网站主页>>>项目整合精选>>>项目整合精选>>>Chrysanthemaxanthin CAS Registry Number: 27780-11-6 (3S,3'S,5R,8S,9顺)-5,8-二氢-5,8-环氧-β,β-叶红素-3,3'-二醇

Chrysanthemaxanthin CAS Registry Number: 27780-11-6 (3S,3'S,5R,8S,9顺)-5,8-二氢-5,8-环氧-β,β-叶红素-3,3'-二醇

CAS Name: (3S,3'R,5R,6'R,8S)-5,8-Epoxy-5,8-dihydro-b,e-carotene-3,3'-diol
Percent Composition: C 82.14%, H 9.65%, O 8.21%

📌 参考资料/链接：
Literature References: Carotenoid pigment. Occurs together with flavoxanthin, q.v.. Has same structural formula, mp, rotation, and absorption as flavoxanthin, but differs sterically. Can be separated chromatographically: in a zinc carbonate column the chrysanthemaxanthin zone locates itself below flavoxanthin and above lutein epoxide. Isoln from asters: Karrer, Jucker, Helv. Chim. Acta 26, 626 (1943). Partial synthesis from lutein, eidem, ibid. 28, 300 (1945). For absolute configuration see: H. Cadosch et al., ibid. 61, 783 (1978).

📄 详细内容

Properties: Golden yellow leaflets, mp 184-185°, also reported as mp 178.5-180° (Codosch). [a]D23 +104° ±5% (c = 1.833 mg/ml in chloroform). Absorption max (CHCl3): 459, 430 nm. uv max (ethanol): 204, 251, 298, 311, 399, 422, 448 nm (e 27300, 28800, 10000, 13100, 97700, 150400, 148500). Freely sol in chloroform, benzene, acetone. Less sol in methanol, ethanol. Almost insol in petr ether.
Melting point: mp 184-185°; mp 178.5-180° (Codosch)
Optical Rotation: [a]D23 +104° ±5% (c = 1.833 mg/ml in chloroform)
Absorption maximum: Absorption max (CHCl3): 459, 430 nm; uv max (ethanol): 204, 251, 298, 311, 399, 422, 448 nm (e 27300, 28800, 10000, 13100, 97700, 150400, 148500)
NOTE: Chrysanthemaxanthin has no vitamin A activity.
产品链接: 27780-11-6››

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