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Determination of absolute configuration and enantiomeric purity of spirocyclic alcohols by 1h nmr

✍ Scribed by Kuninobu Kabuto; Fujiko Yasuhara; Shozo Yamaguchi

Publisher
Elsevier Science
Year
1984
Tongue
French
Weight
265 KB
Volume
25
Category
Article
ISSN
0040-4039

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✦ Synopsis

Absolute configuration and enantiomeric purities of some hydroxyketones and diols of spiro[4_4]nonane and 2,2'-spirobi-indan can be simultaneously determined by use of MTPA derivatives and a lanthanoid shift reagent.

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## Abstract The enantiopure of (__R__)‐(−) MαNPA was allowed to react with racemic 18‐(__tert__‐butyldimethylsilyloxy)‐5‐octadecayne‐7‐ol which was derived from dodecane‐1,12‐diol, yielding diastereomeric esters mixture. These racemic esters were easily separated by HPLC on silica‐gel. The absolute