47675
二乙醇缩甲醛
absolute, over molecular sieve (H2O ≤0.01%), ≥99.0% (GC)
别名:
二乙氧基甲烷, 甲醛缩二乙醇
蒸汽密度
3.6 (vs air)
质量水平
蒸汽压
60 mmHg ( 25 °C)
等级
absolute
方案
≥99.0% (GC)
表单
liquid
自燃温度
346 °F
质量
over molecular sieve (H2O ≤0.01%)
技术
GC/GC: suitable
折射率
n20/D 1.373 (lit.)
n20/D 1.374
沸点
87-88 °C (lit.)
密度
0.831 g/mL at 25 °C (lit.)
官能团
ether
SMILES字符串
CCOCOCC
InChI
1S/C5H12O2/c1-3-6-5-7-4-2/h3-5H2,1-2H3
InChI key
KLKFAASOGCDTDT-UHFFFAOYSA-N
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一般描述
Formaldehyde diethyl acetal (FDEA, diethoxymethane, DEM) is a diethyl acetal. It has been synthesized from ethanol and aqueous formaldehyde. It is a low boiling solvent useful for sodium hydride reactions, organolithium chemistry, copper-catalyzed conjugate additions and phase-transfer reactions. It is a potential alternate for tetrahydrofuran, dichloromethane, glyme and methylal. DEM is an ethoxymethylating agent, a formaldehyde equivalent and a carbonylation substrate. Its condensation with 2-propylresorcinol to form resorcin[n]arenes (n=4–7) has been investigated. The IR and Raman spectra and conformations of DEM have been studied. NMR spectroscopy has been used to study the aggregation behavior of organolithium compounds in diethoxymethane. Unimolecular metastable decomposition of DEM upon electron impact has been studied. Solubility of non-polar gases in DEM has been evaluated.
应用
Formaldehyde diethyl acetal may be used as a solvent in the esterification of carboxylic acids and in the O-alkylation of a variety of phenols.
警示用语：
Danger
危险声明
危险分类
Flam. Liq. 2
储存分类代码
3 - Flammable liquids
WGK
WGK 1
闪点(°F)
23.0 °F - closed cup
闪点(°C)
-5 °C - closed cup
个人防护装备
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
法规信息
危险化学品
Sc(OTf)3-catalyzed cyclocondensation of 2-propylresorcinol with diethoxymethane. Formation and fragmentation of resorcin [n] arenes.
Morikawa O, et al.
Tetrahedron Letters, 45(29), 5731-5734 (2004)
Use of Diethoxymethane as a Solvent for Phase-Transfer Esterification of Carboxylic Acids.
Coleman MT.
Synthetic Communications, 42(13), 1911-1913 (2012)
NMR spectroscopy of organolithium compounds, Part XVI: The aggregation behavior of butyllithium, phenyllithium, and lithium diisopropylamide in dimethoxy-and diethoxymethane.
Bergander K, et al.
Tetrahedron, 50(20), 5861-5868 (1994)
Solubility of non polar gases in formaldehyde diethyl acetal between-10 and 30?C, and 1 Atm partial pressure of gas.
Lizano LP, et al.
Journal of Solution Chemistry, 19(7), 721-728 (1990)
Metastable decompositions of gem-dialkoxyalkanes upon electron impact. III. Diethoxymethane (CH2 (OCH2CH3)2).
Tajima S, et al.
Rapid Communications in Mass Spectrometry, 14(14), 1195-1199 (2000)
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