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。