Acetic acid, 2-(triphenylphosphoranylidene)-, methyl ester
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
2605-67-6COC(=O)C=P(c1ccccc1)(c1ccccc1)c1ccccc1NTNUDYROPUKXNA-UHFFFAOYSA-N2605-67-6DTXSID6062549CHEMBL1715161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。
This chemical does not meet GHS hazard criteria for 50% (2 of 4) of reports.
Danger
H301 (50%): Toxic if swallowed [Danger Acute toxicity, oral]
P261, P264, P264+P265, P270, P271, P280, P301+P316, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 4 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Acetic acid, (triphenylphosphoranylidene)-, methyl ester
REACH registered substance: Methyl (triphenylphosphoranylidene)acetate (EC: 220-018-4)
用途有機合成原料。
使用(Methoxycarbonylmethylene)triphenylphosphorane is used in olefination reactions. Wittig reagent for the two-carbon homologation of aldehydes to α,β-unsaturated esters. it undergoes the Wittig reaction with aldehydes to give substituted methyl acrylates. used in an efficient synthesis of pyrazoles via reaction with methyl diazoacetate in the presence of triethylamine. It is used in the preparation of (triphenylphosphoranylidene)-ketene. The Wittig reaction we performed in class involved the reaction of 2-nitrobenzaldehyde (1) with methyl (triphenylphosphoranylidene) acetate (2) to produce methyl (2E)-3-(2-nitrophenyl) acrylate (3) with a triphenylphosphine oxide (4) side product, and took place in a silica gel matrix to ensure even product dispersion for chromatography.
純化方法Crystallise it by dissolving in it AcOH and adding pet ether (b 40-50o) to give colourless plates. UV max (A 1mm ): 222nm (865) and 268nm (116) [Isler et al. Helv Chim Acta 40 1242 1957]. [Beilstein 16 IV 977.]
読み込み中…
化学的特性white to off-white powder