@article{oai:soar-ir.repo.nii.ac.jp:00010801,
 author = {唐沢,  伝英},
 issue = {1},
 journal = {信州大学農学部紀要},
 month = {Jun},
 note = {Many previous workers were concerned with optical rotation of terpin-l-en-4-ol (terpinen-4-ol) isolated from the various essential oils to give several different optical values. The present report was carried out to check the optical purity of terpinen-4-ol by means of the integration for signal of 4R-and 4S-terpinen-4-ol in NMR spectra using a chiral shift reagent. From the results obtained, the value of [α]D²⁰+48.3°, which has been reported by NAVES was found to be a reliable one of 4S-(+)-terpinen-4-ol. Furthermore, some monoterpenes such as a-thujene, sabinene and sabinene hydrate are known to be very sensitive to acid and rearrange to terpinen-4-ol accompanied by partial racemization. Therefore, the low optical rotations given for terpinen-4-ol isolated from various essential oils by previous workers, seem to be caused by isomerization of terpenes which are labile to acid, during the isolation of this alcohol., Article, 信州大学農学部紀要 14(1): 119-125(1977)},
 pages = {119--125},
 title = {Terpinen-4-olの光学活性について(不斉シフト試薬を用いた核磁気共鳴による光学純度の測定)},
 volume = {14},
 year = {1977}
}