4-Toluenesulfonyl chloride → (S)-2-(Benzyloxycarbonylamino)-1-((S)-2,5-dihydrofuran-2-yl)ethyl 4-methylbenzenesulfonate

HRID 1887385노트

반응식

HRID 1887385 반응식
[C:1]1([CH3:11])[CH:6]=[CH:5][C:4]([S:7](Cl)(=[O:9])=[O:8])=[CH:3][CH:2]=1.[O:12]1[CH2:16][CH:15]=[CH:14][C@H:13]1[C@@H:17]([OH:30])[CH2:18][NH:19][C:20](=[O:29])[O:21][CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>N1C=CC=CC=1.O>[CH3:11][C:1]1[CH:6]=[CH:5][C:4]([S:7]([O:30][C@H:17]([C@@H:13]2[CH:14]=[CH:15][CH2:16][O:12]2)[CH2:18][NH:19][C:20]([O:21][CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[O:29])(=[O:9])=[O:8])=[CH:3][CH:2]=1

참가 물질

5

반응물 2

HCID 73974-Toluenesulfonyl chlorideHCID 59343386Benzyl (S)-2-((S)-2,5-dihydrofuran-2-yl)-2-hydroxyethylcarbamate

생성물 1

HCID 59343388(S)-2-(Benzyloxycarbonylamino)-1-((S)-2,5-dihydrofuran-2-yl)ethyl 4-methylbenzenesulfonate수율 61.4%

시약·촉매·용매 2

HCID 962Water용매HCID 1049Pyridine용매

실험 절차

A solution of p-toluenesulfonyl chloride (252 mg, 1.32 mmol) in pyridine (7.0 mL), alcohol (17) (290 mg, 1.10 mmol) was stirred at 24° C. for 2 days then diluted with water (15 mL). The product was extracted into tert-butyl methyl ether (3×20 mL) then dried (MgSO4), filtered and reduced in vacuo. Flash chromatography over silica, eluting with ethyl acetate:heptane mixtures 7:93 to 20:80 gave tosylate (32) (282 mg, 61%) as a colourless oil. TLC (Rf=0.35, EtOAc:heptane 1:1), analytical HPLC single main peak, Rt=19.02 min., HPLC-MS 418.2 [M+H]+, 857.3 [2M+Na]+; [α]D11 −86.1° (c=1.103, CHCl3; δH (500 MHz, CDCl3) 2.37 (3H, s, aryl-CH3), 3.29-3.37 and 3.50-3.56 (2H total, m, CH2NH), 4.53-4.56 (2H total, m, OCH2CH═CH), 4.62-4.66 m, OCHCH═CH), 4.85-4.90 (1H, m, CHOTs), 5.02-5.08 (2H, m, OCH2Ph), 5.02 (1H, brs, NH), 5.65-5.70 and 5.94-5.98 (2H total, m, CH2CH═CH), 7.27 (2H, d, J=8.12 Hz, aromatic CH3CCH), 7.29-7.37 (5H, m, phenyl CH), 7.76 (2H, d, J=8.23 Hz, aromatic OSO2CCH); δC (125 MHz, CDCl3) 21.609 (aryl-CH3), 41.749 (CH2NHCbz), 66.833 (CH2Ph), 75.939 (OCH2CH═CH), 81.235 (CHOTs), 85.203 (OCHCH═CH), 124.702, 127.887, 128.026, 128.128, 128.504, 129.687 and 129.757 (OCH2CH═CH and aromatic CH), 133.591 (CHOSO2C quaternary), 136.368 (Cbz quaternary), 144.906 (CH3C quaternary), 156.271 (Cbz C═O).

후처리

  1. extractionThe product was extracted into tert-butyl methyl ether (3×20 mL)
  2. dry with materialthen dried (MgSO4)
  3. filtrationfiltered
  4. washFlash chromatography over silica, eluting with ethyl acetate

출처 및 근거

ORD 기록
ord-f1742bc4832e45df9f89d700635f46cf
출처 데이터셋
uspto-grants-2013_08
특허 번호
US08501744B2

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