Enantiospecific synthesis, separation and olfactory evaluation of all diastereomers of a homologue of the sandalwood odorant Polysantol®
作者:Juan M. Castro、Pablo J. Linares-Palomino、Sofía Salido、Joaquín Altarejos、Manuel Nogueras、Adolfo Sánchez
DOI:10.1016/j.tet.2005.09.023
日期:2005.11
from (+)- and (−)-α-pinene, through (−)- and (+)-campholenic aldehyde, by aldol condensation with 3-pentanone, deconjugative α-methylation and reduction. The mixtures of epimeric alcohols obtained after reduction were separated by means of derivatization with (−)-(1S)-camphanic chloride. The enantiomerically pure final products were evaluated organoleptically.
(5 E)-4,4-二甲基-6-(2',2',3'-三甲基环戊-3'-en-1'-yl)-hex-5-en-3-ol的四个立体异构体,有价值的檀香型的加臭剂的同源物Polysantol ®和( - - ) - ,被enantiospecifically从(+)合成α蒎烯,通过( - ) -和(+) -龙脑烯醛,通过与3-戊酮醇醛缩合,去共轭α-甲基化和还原。还原后得到的差向异构醇的混合物通过用(-)-(1S)-樟脑氯化物衍生化而分离。对映体纯的最终产物通过感官评估。