Potassium Carbonate → (2R,3R,4R,5R)-4-benzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-2,3-diol

HRID 2059570노트

반응식

HRID 2059570 반응식
C([O:9][C@@H:10]1[C@:14]([C:16]#[CH:17])([OH:15])[C@H:13]([O:18][C:19](=[O:26])[C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[C@@H:12]([CH2:27][O:28][C:29](=[O:36])[C:30]2[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=2)[O:11]1)(=O)C1C=CC=CC=1.C([O-])([O-])=O.[K+].[K+]>CO.C1COCC1>[C:19]([O:18][C@@H:13]1[C@@H:12]([CH2:27][O:28][C:29](=[O:36])[C:30]2[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=2)[O:11][C@@H:10]([OH:9])[C@:14]1([C:16]#[CH:17])[OH:15])(=[O:26])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

참가 물질

5

반응물 2

HCID 11430Potassium CarbonateHCID 86642243(2R,3R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-3-ol

생성물 1

HCID 86642244(2R,3R,4R,5R)-4-benzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-2,3-diol

시약·촉매·용매 2

HCID 887Methanol용매HCID 8028Tetrahydrofuran용매

실험 절차

Intermediate (2R,3R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydro-furan-3-ol (2.048 g, 4.21 mmol, 1.0 equiv.) is dissolved in methanol (10 ml) and THF (10 ml). K2CO3 (176 mg, 1.26 mmol, 0.3 equiv.) is added, The reaction is stirred at ambient temperature for 2 h, filtered on silica gel, concentrated and purified by flash chromatography to give (2R,3R,4R,5R)-4-benzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-2,3-diol as a foam. 1H-NMR (400 MHz, CDCl3): δ 8.06-7.96 (m, 4H), 7.54-7.26 (m, 6H), 5.88 (d, 0.26H, J=6.4 Hz), 5.54 (s, 0.72H), 5.53 (d, 0.72H, J=5.2 Hz), 5.41 (s, 0.28H), 5.28 (bs, 1H), 4.67-4.49 (m, 3H), 4.22 (bs, 1H), 2.67 (s, 0.26H), 2.59 (s, 0.71H); 13C-NMR (100 MHz, CDCl3): δ 166.74, 166.61, 165.74, 165.66, 133.79, 133.71, 133.52, 133.33, 133.24, 130.11, 130.05, 130.02, 129.89, 129.81, 129.44, 129.41, 128.86, 128.75, 128.57, 128.41, 128.36, 81.87, 80.07, 79.23, 77.89, 77.21, 76.61, 76.39, 75.77, 75.58, 72.83, 65.29, 64.26.

후처리

  1. filtrationfiltered on silica gel
  2. concentrationconcentrated
  3. custompurified by flash chromatography

출처 및 근거

ORD 기록
ord-43ea3253aa1443df9f08cdb13666aa41
출처 데이터셋
uspto-grants-2012_10
특허 번호
US08278282B2

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