Vinylene carbonate → 2-(4-Nitrobenzyl)oxazole

HRID 1508861ノート

反応式

HRID 1508861 の反応式
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([CH2:10][C:11]([NH2:13])=[O:12])=[CH:6][CH:5]=1)([O-:3])=[O:2].O1[CH:18]=[CH:17]OC1=O.CS(O)(=O)=O.O=P12OP3(OP(OP(O3)(O1)=O)(=O)O2)=O>>[N+:1]([C:4]1[CH:5]=[CH:6][C:7]([CH2:10][C:11]2[O:12][CH:17]=[CH:18][N:13]=2)=[CH:8][CH:9]=1)([O-:3])=[O:2]

参加物

4

反応物 3

HCID 13385Vinylene carbonateHCID 2336132-(4-Nitrophenyl)acetamideHCID 86584057Phosphorus Pentoxide-Methanesulfonic Acid

生成物 1

HCID 901105832-(4-Nitrobenzyl)oxazole収率 25%

反応条件

温度
100 °C

実験手順

A mixture of 2-(4-nitrophenyl)acetamide (1.0 g, 5.55 mmol), 1,3-dioxol-2-one (0.955 g, 11.10 mmol), and Eaton's Reagent (9.9 g, 34.97 mmol) was heated to 100° C. overnight under a nitrogen atmosphere. After this time, the reaction was cooled, diluted with ice water, and extracted with ethyl acetate. The combined organic layer was dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated. The residue was purified by column chromatography (silica, dichloromethane/methanol) to afford the title compound (0.250 g, 25%). MW=204.18. 1H NMR (DMSO-d6, 500 MHz) δ 8.26-8.18 (m, 2H), 8.05 (d, J=0.8 Hz, 1H), 7.57 (d, J=8.8 Hz, 2H), 7.16 (s, 1H), 4.34 (s, 2H); APCI MS m/z 205 [M+H]+.

後処理

  1. temperatureAfter this time, the reaction was cooled
  2. extractionextracted with ethyl acetate
  3. dry with materialThe combined organic layer was dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationthe filtrate was concentrated
  6. customThe residue was purified by column chromatography (silica, dichloromethane/methanol)

出典と根拠

ORDレコード
ord-0cd4594167a24100aa1fe8653a3acc07
出典データセット
uspto-grants-2015_12
特許番号
US09221843B2

反応ノート

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