Total Synthesis of C31-Methyl Ketone Apocarotenoids 3. On the Structure of Hopkinsiaxanthin: First Total Synthesis of (all-E)-(3S)- and (9Z)-(3S)-7'-Apohopkinsiaxanthin.
作者:Jarle André Haugan、Emil Lobkovsky、Synnøve Liaaen-Jensen、Lars Skattebøl、Connie N. Rosendahl
DOI:10.3891/acta.chem.scand.51-1201
日期:——
Optically active (all-E)-(3S)-7'-apohopkinsiaxanthin, previously known as F1, and (9Z)-(3S)-7'-apohopkinsiaxanthin have been prepared by total synthesis for the first time in ca. 1% combined overall yield, including two unidentified geometrical isomers, in sixteen linear steps from (4R,6R)-actinol, (2E)-3-methyl-2-penten-4-yn-1-ol, (7-formyl-2-methyl-2,4,6-octatrienyl)triphenylphosphonium bromide,
光学活性的(全-E)-(3S)-7'-apokopkinsiaxanthin,以前称为F1,和(9Z)-(3S)-7'-apohopkinsiaxanthin已经通过全合成首次在约4。由(4R,6R)-肌醇,(2E)-3-甲基-2-戊烯-4-yn-1-ol,(7-甲酰基-通过使用C15 + C10 + C5 + C1方法,可制得2-甲基-2,4,6-辛基三烯基)三苯基溴化,、(3-甲酰基-2-丁烯基)三苯基phosph和甲基锂。通过(2Z)-5-[[((4S)-4-羟基-2,6,6-三甲基-3-氧代-1-环己烯基)-3-甲基-2-戊烯-4-炔基]的替代方法溴化三苯基phosph,(7-甲酰基-2-甲基-2,4,6-辛三烯基)三苯基溴化and和(2E)-3-甲基-4-氧代-2-戊烯醛,以相同的总收率获得了相同的目标化合物的> 61%,通过使用C15 + C16方法,在两个步骤中包括四个不确定