Synthesen in der Carotinoid-Reihe. 12. Mitteilung. Synthese von 11,11′-Di-cis-β-carotin nach einem neuen Aufbauprinzip
作者:O. Isler、L. H. Chopard-dit-Jean、M. Montavon、R. Rüegg、P. Zeller
DOI:10.1002/hlca.19570400517
日期:——
11,11′-Di·cis-β-carotene was synthesized awarding to a new scheme C14 + C12 + C14 = C40 by condensing the crystalline C12-di-acetylenic hydrocarbon 3,8-dimethyl-decatriene-(3,5,7)-diyne-(9) at both ends with β-C14-aldehyde followed by dehydration and partial hydrogenation of the triple bonds. 11,11′-Di-cis-β-carotene shows about one third of the vitamin A activity of all-trans-β-carotene and is structurally
通过缩合结晶的C 12-二炔烃3,8-二甲基-癸三烯-(11,11'-Di·顺式-β-胡萝卜素合成了一种新的方案C 14 + C 12 + C 14 = C 40 3,5,7)-diyne-(9)在与β-C两端14 -醛,接着脱水和三键的部分氢化。11,11'-顺式-β-胡萝卜素显示出全反式-β-胡萝卜素约占维生素A活性的三分之一,并且在结构上与重要的视觉色素新-b-视黄素相关。雷斯蒂涅。11,11'-顺式-β-胡萝卜素比15,15'-对热更稳定顺式-β-胡萝卜素。