(S)-(-)-1,1'-Bi-2-naphthol

Synonyms:
(S)-(-)-1,1'-Bi(2-naphthol)
(S)-(-)-1,1'-Binaphthalene-2,2'-diol
(S)-(-)-2,2'-Dihydroxy-1,1'-dinaphthyl
(S)-(-)-BINOL

CAS Number: 18531-99-2

Structural Formula:

Molecular Formula: C₂₀H₁₄O₂
Linear Formula: HOC₁₀H₆C₁₀H₆OH
Molecular Weight: 286.32

Application:
A chiral auxiliary used in the catalytic asymmetric oxidation of sulfides to sulfoxides. Chiral lanthanide triflates formed from binaphthol serve as catalysts for asymmetric Diels-Alder reactions. Derivatives of  inaphthol have recently found use in asymmetric Claisen rearrangements and asymmetric epoxidations. The lithium aluminum hydride derivative of these
diols (BINAP-H) has been used extensively for the reduction of ketones.

Standards:
Appearance: white crystalline powder
Chiral Assay(HPLC):ee: 99.5%ee+ ( optical purity)
Chemical Assay(HPLC): 99.5%+
optical activity：([a]22/D): -34°, c = 1 in THF
Melting Point: 208-210 °C (lit.)
Loss on drying: 0.05%

Packaging specifications:
Cardboard drum Packaging: 5kgs/ drum. 10kgs/ drum. 20kgs/ drum. 25kgs/ drum
Reagent Packaging: 100g/ Bottle. 500g/ Bottle. 1kgs/ Bottle.