Phosphonium, [2-(1,3-dioxolan-2-yl)ethyl]triphenyl-, bromide (1:1) → Phenylmethyl 3-[2-(1,3-dioxolan-2-yl)ethylidene]azetidine-1-carboxylate

HRID 1809022ノート

反応式

HRID 1809022 の反応式
CC(C)([O-])C.[K+].[Br-].[O:8]1[CH2:12][CH2:11][O:10][CH:9]1[CH2:13][CH2:14][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O=[C:35]1[CH2:38][N:37]([C:39]([O:41][CH2:42][C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)=[O:40])[CH2:36]1>CCOCC>[O:10]1[CH2:11][CH2:12][O:8][CH:9]1[CH2:13][CH:14]=[C:35]1[CH2:36][N:37]([C:39]([O:41][CH2:42][C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)=[O:40])[CH2:38]1

参加物

5

反応物 3

HCID 2733834Phosphonium, [2-(1,3-dioxolan-2-yl)ethyl]triphenyl-, bromide (1:1)HCID 10632047Benzyl 3-oxoazetidine-1-carboxylateHCID 23665647Potassium tert-butoxide

生成物 1

HCID 67051614Phenylmethyl 3-[2-(1,3-dioxolan-2-yl)ethylidene]azetidine-1-carboxylate収率 15.2%

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒2 回

反応条件

温度
35 °C

実験手順

Potassium tert-butoxide (1.393 g, 12.4 mmol) and [2-(1,3-dioxolan-2-yl)ethyl]-triphenylphosphonium bromide (5.51 g, 12.4 mmol) were stirred in ether (30 mL) at ambient for 1 h. Phenylmethyl 3-oxoazetidine-1-carboxylate (1.025 g, 5.0 mmol), prepared using procedures similar to those described in Reference 3, was added and the mixture was stirred at 35° C. for 6 h and then at ambient for 4 days. Mixture was filtered through celite and the solid was washed with ether. The filtrate was washed with water, brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Column chromatography (silica gel, 20% ether in hexanes) gave phenylmethyl 3-[2-(1,3-dioxolan-2-yl)ethylidene]azetidine-1-carboxylate (220 mg, 0.761 mmol, 15% yield): 1H NMR (400 MHz, CDCl3): 7.39-7.28 (m, 5H), 5.43-5.35 (m, 1H), 5.11 (s, 2H), 4.89 (t, 1H), 4.56 (br d, 4H), 4.00-3.92 (m, 2H), 3.91-3.83 (m, 2H), 2.27 (br t, 2H).

後処理

  1. additionwas added
  2. waitat ambient for 4 days
  3. filtrationMixture was filtered through celite
  4. washthe solid was washed with ether
  5. washThe filtrate was washed with water, brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-ff7bfd06e0714963ace74a2849f2180c
出典データセット
uspto-grants-2013_01
特許番号
US08362002B2

反応ノート

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