51673-84-8
2,2-Dimethoxyacetaldehyde
CAS: 51673-84-8
Molecular Formula: C4H8O3
51673-84-8 - Names and Identifiers
| Name | 2,2-Dimethoxyacetaldehyde |
| Synonyms | Dimethoxyacetaldehyde Glyoxal dimethyl acetal GLYOXAL DIMETHYL ACETAL 2,2-Dimethoxyacetaldehyde glyoxal 1,1-dimethyl acetal |
| CAS | 51673-84-8 |
| EINECS | 421-890-0 |
| InChI | InChI=1/C4H8O3/c1-6-4(3-5)7-2/h3-4H,1-2H3 |
| InChIKey | OGFKTAMJLKHRAZ-UHFFFAOYSA-N |
51673-84-8 - Physico-chemical Properties
| Molecular Formula | C4H8O3 |
| Molar Mass | 104.1 |
| Density | 0.991g/cm3 |
| Boling Point | 63.9°C at 760 mmHg |
| Flash Point | 169 °F |
| Water Solubility | Fully miscible in water. |
| Vapor Presure | 168mmHg at 25°C |
| BRN | 1850744 |
| Storage Condition | 2-8°C |
| Refractive Index | 1.378 |
| MDL | MFCD00134410 |
| Physical and Chemical Properties | Properties Glyoxal -1, 1-dimethylacetal has a boiling point of 63.9 ℃, a density of 0.99(1g/cm3) and a vapor pressure of 168(mmHgat25 ℃). |
| Use | Application of glyoxal-1, 1-dimethylacetal is a colorless, low-toxic, non-volatile aldehyde, containing an aldehyde group with higher reactivity and an acetal group with lower reactivity but can be easily converted into an aldehyde group. In synthetic chemistry, it is often used in reactions such as ring closing, extending the parent chain structure and introducing aldehyde groups. As an important fine intermediate, it is widely used in the resin industry, perfume industry and pharmaceutical industry. |
51673-84-8 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R43 - May cause sensitization by skin contact |
| Safety Description | S24 - Avoid contact with skin. S37 - Wear suitable gloves. |
| UN IDs | UN 2398 3/PG 2 |
| WGK Germany | - |
| TSCA | Yes |
51673-84-8 - Upstream Downstream Industry
| Downstream Products | 1,4-Dioxane, 2,3-dimethoxy- 4-METHYLFORMANILIDE 1,1,2,2-Tetramethoxyethane Glycolic acid |
51673-84-8 - Preparation
Step 1,
add 50g(0.735mol) of furan and 1000mL of methanol to a 2000mL reaction bottle with mechanical stirring and thermometer, place them at -50 ℃, replace the air, and then slowly add 240g(1.5mol) of bromine, react for 3h after dropping, continue the reaction at 0 ℃ for 2h, and rise to room temperature after the reaction, the pH of the reaction solution was adjusted to 7-8 with 1000mL saturated sodium bicarbonate solution, the remaining methanol was evaporated under reduced pressure, the reaction solution was extracted three times with 1000mL ethyl acetate, the combined organic phase was washed with saturated sodium chloride solution, the organic phase was separated, and 75g of compound 1,1,4, 4-tetramethoxy -2-butene was obtained after ethyl acetate was evaporated.
Step 2,
70g of compound 1,1,4,4-tetramethoxy -2-butene and 500mL of methyl sulfide are added to a 1000mL reaction bottle with mechanical stirring and thermometer, placed at -10 ℃, replaced the air in the bottle, then introduced nitrogen, slowly injected 30g of ozone into a closed reaction system, controlled the reaction temperature to be maintained at -10 ℃, the raw material reacts completely after 10h of reaction, and rises to room temperature, the solvent was distilled to obtain 32g of compound glyoxal -1, 1-dimethylacetal.
Last Update：2024-04-09 01:59:50
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