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 1717618노트

반응식

HRID 1717618 반응식
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

참가 물질

5

반응물 3

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

생성물 1

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

시약·촉매·용매 1

HCID 3283Diethyl Ether용매2회

반응 조건

온도
35 °C

실험 절차

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).

후처리

  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

출처 및 근거

ORD 기록
ord-168782df2bd24662be3c1338992df051
출처 데이터셋
uspto-grants-2010_09
특허 번호
US07803839B2

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