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Determination of Absolute Configuration of Hydroxyl Group of Long Chain Alcohols, and Discrimination of E- / Z-isomers of Double Bond Kusakari Miho1, Murakami Satoshi 1, Sato Ei-ichi 3, Kato Akane1, Matsumoto Takatoshi 2, Hatano Bunpei1, Izumi Taeko1, Watanabe Masataka1, Kijima Tatsuro1 Yamagata University1, 992-8510, Yonezawa, Japan Tohoku University 2, 980-8577, Sendai, Japan Kusumoto Chemicals Ltd.3, 340-0004, Souka, Japan It is well known that configuration of double bond (E or Z) depends on their 1H NMR coupling constant. We reinvestigated configuration of double bond and absolute configuration of hydroxyl group of methyl ricinoleate 1 to have Z-configuration and R-configuration of hydroxyl group by 1H NMR spectrum and 2D NMR spectrum using (S)-(+)- and (R)-(‐)-2-methoxy-2-(1-naphthyl) propionic acid (MαNP acid) 2 as a chiral auxiliaries. However configuration of double bond of oleic acid 3 could not be determined by 1H NMR spectrum. We will also reported that double bond of configuration of 3 has Zconfiguration by 2D NMR spectrum.
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