DIBENZYL CARBONATE
- CAS No.
- 3459-92-5
- Chemical Name:
- DIBENZYL CARBONATE
- Synonyms
- Benzyl carbonate;NSC 406789;DIBENZYL CARBONATE;dibenzyl carbazate;Dibenzylcarbonate,98%;Linezolid Impurity 50;Dibenzyl Carbonate >Dibenzyl carbonate 99%;CARBONIC ACID DIBENZYL ESTER;Carbonic acid, bis(phenylmethyl) ester
- CBNumber:
- CB5677478
- Molecular Formula:
- C15H14O3
- Molecular Weight:
- 242.27
- MOL File:
- 3459-92-5.mol
- MSDS File:
- SDS
- Modify Date:
- 2023/10/12 18:06:02
| Melting point | 29-33 °C(lit.) |
|---|---|
| Boiling point | 180-190 °C2 mm Hg(lit.) |
| Density | 1.1515 (rough estimate) |
| refractive index | 1.5485 |
| Flash point | >230 °F |
| solubility | Sparingly Soluble (0.099 g/L) (25°C). |
| form | powder to lump |
| color | White to Almost white |
| Sensitive | Air Sensitive |
| BRN | 1882864 |
| CAS DataBase Reference | 3459-92-5(CAS DataBase Reference) |
| EPA Substance Registry System | Carbonic acid, bis(phenylmethyl) ester (3459-92-5) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H302+H312-H302-H312 | |||||||||
| Precautionary statements | P280-P264-P270-P301+P312+P330-P302+P352+P312+P362+P364-P501-P280h-P301+P312a-P321-P501a | |||||||||
| Hazard Codes | Xn | |||||||||
| Risk Statements | 21/22 | |||||||||
| Safety Statements | 36 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 29209090 | |||||||||
| NFPA 704 |
|
DIBENZYL CARBONATE price More Price(2)
DIBENZYL CARBONATE Chemical Properties,Uses,Production
Chemical Properties
Colorless low melting solid
Uses
Ionic liquids can effectively accelerate slow N-benzylation reactions utilizing dibenzyl carbonate as an alkylating reagent. Dibenzyl carbonate (DBzlC) has been used to benzylate phenylacetonitrile, benzyl phenylacetate and phenol. Selective N, N-dibenzylation of primary aliphatic amines was carried with dibenzyl carbonate in the presence of phosphonium salts.
Preparation
To a stirred solution of benzyl alcohol (0.216 g, 2.00 mol), tributylphosphine (0.303 g, 1.50 mmol), and CyTMG (0.394 g, 2.00 mmol) in DMF (2.00 mL), CO2 was added at room temperature. After 15 min, tetrabromomethane (0.663 g, 2.00 mmol) was added, the reaction vessel was sealed, and the contents were stirred for 2 h. Thereafter, the reaction mixture was diluted with ethyl acetate, washed successively with 0.5 m aqueous HCl and saturated aq. NaHCO3 solution, and dried over Na2SO4. Diphenylmetha- nol was added to the organic solution as an internal standard and the yield of dibenzyl carbonate was determined from the relative integrals of a methylene peak of the carbonate and a methine peak of diphenylmethanol in the 1H NMR spectrum of the ethyl acetate solution. Dibenzyl carbonate, prepared by a larger scale reaction of CO2 with benzyl alcohol (1.08 g, 10.0 mmol), was isolated by column chromatography (cyclohexane/ethyl acetate, 50:1) in 67.3% yield (0.816 g).
General Description
Dibenzyl carbonate (DBC) is commonly used as a benzylating agent. Dimethyl carbonate and excess of benzyl alcohol undergoes transesterification in the presence of CsF/α-Al2O3 (cesium fluoride/aluminum oxide) to form DBC. The formation of N,N-dibenzyl derivatives by the reaction of primary aliphatic amines with DBC in the presence of phosphonium salts has been investigated.
DIBENZYL CARBONATE Preparation Products And Raw materials
Raw materials
Preparation Products
DIBENZYL CARBONATE Suppliers
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