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A new protopanaxadiol-type ginsenoside from the roots of Panax notoginseng

Hui-Zheng Fu1, Rui-Jian Zhong, Dong-Ming Zhang

  • 1a Jiangxi Provincial Institute for Drug and Food Control , Nanchang , 330029 , China.

Journal of Asian Natural Products Research
|July 23, 2013
PubMed

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Preparation of Diols and Pinacol Rearrangement01:57

Preparation of Diols and Pinacol Rearrangement

Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.