Preparation of Optically Pure (3<i>S</i>,5<i>S</i>)- and (3<i>R</i>,5<i>R</i>)-2,6-Dimethyl-3,5-heptanediol
作者:Takashi Sugimura、Masato Yoshikawa、Tohru Yoneda、Akira Tai
DOI:10.1246/bcsj.63.1080
日期:1990.4
Optically pure 2,6-dimethyl-3,5-heptanediol (1), a new chiral auxiliary, has been prepared by the enantiodifferentiating hydrogenation of 2,6-dimethyl-3,5-heptanedione over tartaric acid–NaBr–modified Raney nickel catalyst (TA–NaBr–MRNi), and the preferential recrystallization of the hydrogenation product. Absolute configuration of 1 was determined to be 3S, 5S by the chemical correlation with (−)-ethyl
光学纯的 2,6-二甲基-3,5-庚二醇 (1),一种新的手性助剂,通过 2,6-二甲基-3,5-庚二酮在酒石酸-溴化钠改性雷尼镍上对映分化氢化制备催化剂(TA-NaBr-MRNi),以及加氢产物的优先重结晶。通过与(-)-乙基(S)-3-羟基-4-甲基戊酸酯的化学相关性确定1的绝对构型为3S、5S。