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benzoin
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Benzoin ( or ) is an organic compound with the formula PhCH(OH)C(O)Ph. It is a hydroxy ketone attached to two phenyl groups. It appears as off-white crystals, with a light camphor-like odor. Benzoin is synthesized from benzaldehyde in the benzoin condensation. It is chiral and it exists as a pair of enantiomers: (''R'')-benzoin and (''S'')-benzoin.
Benzoin is ''not'' a constituent of benzoin resin obtained from the benzoin tree ''(Styrax)'' or tincture of benzoin. The main component in these natural products is benzoic acid.
==History==
Benzoin was first reported in 1832 by Justus von Liebig and Friedrich Woehler during their research on oil of bitter almond, which is benzaldehyde with traces of hydrocyanic acid. The catalytic synthesis by the benzoin condensation was improved by Nikolay Zinin during his time with Liebig.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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