2,2'-DIBROMO-1,1'-BINAPHTHYL

CAS No.：74866-28-7

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2,2'-DIBROMO-1,1'-BINAPHTHYL Basic information

Product Name:	2,2'-DIBROMO-1,1'-BINAPHTHYL
Synonyms:	2,2'-DIBROMO-1,1'-BINAPHTHYL;2,2'-DIBROMO-1,1'-DINAPHTHYL;RACEMIC-2,2'-DIBROMO-1,1'-BINAPHTHYL;2,2'-Dibromo-1,1'-binapthyl;racemic-2,2'-Dibromo-1,1'-binaphthyl,99%;1,1'-Bi(2-bromonaphthalene);2,2'-Dibromo-1,1'-binaphthalene;rac-2,2'-Dibromo-1,1'-binaphthyl,
CAS:	74866-28-7
MF:	C20H12Br2
MW:	412.12
EINECS:	626-733-1
Product Categories:	Aryl;C13 to C37+;Halogenated Hydrocarbons
Mol File:	74866-28-7.mol

2,2'-DIBROMO-1,1'-BINAPHTHYL Chemical Properties

Melting point	178-183 °C
Boiling point	178-183°C
density	1.614±0.06 g/cm3(Predicted)
Fp	178-183°C
storage temp.	Sealed in dry,Room Temperature
solubility	soluble in Toluene
form	Powder
color	white to off-white
Water Solubility	Sparingly Soluble in water.
CAS DataBase Reference	74866-28-7(CAS DataBase Reference)

Safety Information

Hazard Codes	Xn
Risk Statements	36/37/38-22
Safety Statements	26-36/37/39
WGK Germany	3

MSDS Information

2,2'-DIBROMO-1,1'-BINAPHTHYL Usage And Synthesis

Uses	The synthesis of this class of compounds relies on the lithiation of racemic 2,2'-dibromo-1,1'-binaphthyl with t-BuLi followed by addition of Ph 2 PCl.
Purification Methods	Purify the binaphthyl by chromatography through a silica gel column (70-230mesh) using hexane as eluent. It gives pale yellow crystals from EtOH with m 187.3-187.9o. The R-(+)-enantiomer [86688-08-6] crystallises from hexane with m 157-157.5o and [] D +32.9o (c 1, pyridine) [Brown et al. J Org Chem 50 4345 1985]. [Okamoto et al. J Am Chem Soc 103 69711981, Beilstein 5 III 2465.]

2,2'-DIBROMO-1,1'-BINAPHTHYL Preparation Products And Raw materials

Raw materials

Ethanol-->Ethyl acetate-->PETROLEUM ETHER-->Government regulation-->Acetonitrile-->Triphenylphosphine-->1,1'-Bi-2-naphthol

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