Triethyl phosphonoacetate
データを補完しています。しばらくしてからページを更新すると最新の内容を表示できます
867-13-0CCOC(=O)CP(=O)(OCC)OCCGGUBFICZYGKNTD-UHFFFAOYSA-N867-13-0DTXSID4041573CHEMBL3185304FCS -> FDA Cumulative Estimated Daily Intake (CEDI)
FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
Warning
H315 (22.9%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 70 reports by companies from 17 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Acetic acid, (diethoxyphosphinyl)-, ethyl ester
Regulation (EC) No 1935/2004 (amended)
Status: Active Update: 19-08-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/11013
Acetic acid, (diethoxyphosphinyl)-, ethyl ester: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
用途有機合成原料。
説明Triethyl phosphonoacetate is a reagent for organic synthesis used in the Horner-Wadsworth-Emmons reaction (HWE) or the Horner-Emmons modification. This compound can be added dropwise to sodium methoxide solution to prepare a phosphonate anion. It has an acidic proton that can easily be abstracted by a weak base. When used in an HWE reaction with a carbonyl, the resulting alkene formed is usually the E alkene and is generated with excellent regioselectivity. It can synthesize β-Keto Phosphonates via an acylation reaction of triethyl phosphonoacetate with carboxylic acid chlorides in the presence of magnesium chloride-triethylamine followed by decarbethoxylation. Acylation of triethyl phosphonoacetate using magnesium ethoxide affords acyl phosphonoacetates, which, on treatment with catalytic p-TsOH in water, are converted into 2-aryl-2-oxoalkylphosphonates[1-2].
使用Triethyl phosphonoacetate serves as a reactant used in Horner-Wadsworth-Emmons reactions, Tsuji-Trost type reactions, Intramolecular Heck-type cyclization and isomerizations and Intramolecular aryne-ene reactions. In Horner-Wadsworth-Emmons reaction, it is utilized as a reagent to prepare chiral 2-methylcyclopropanecarboxylic acid from (S)-propylene oxide.
純化方法Purify it by fractional distillation, preferably in vacuo. NMR has P resonance at 19.5 relative to orthophosphate. [Kosolapoff & Powell J Am Chem Soc 68 1103 1946, Kosolapoff & Powell J Am Chem Soc 72 4198 1950, Speziale & Freeman J Org Chem 23 1586 1958, Beilstein 4 IV 3613.]
読み込み中…
化学的特性Triethyl phosphonoacetate is Colorless to light yellow liqui