Benzoyl chloride → HCID 69929399, compound

HRID 2230929Notes

Reaction equation

HRID 2230929 reaction equation
[CH2:1]([O:8][C@H:9]1[C@H:16]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C@@H:15]([CH2:25][O:26][CH2:27][C:28]2[CH:33]=[CH:32][C:31]([Cl:34])=[CH:30][CH:29]=2)[O:14][C@@H:11]([O:12][CH3:13])[C@@H:10]1[OH:35])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:36](Cl)(=[O:43])[C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1>C(Cl)Cl.CN(C1C=CN=CC=1)C>[C:36]([O:35][C@@H:10]1[C@@H:9]([O:8][CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[C@H:16]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C@@H:15]([CH2:25][O:26][CH2:27][C:28]2[CH:29]=[CH:30][C:31]([Cl:34])=[CH:32][CH:33]=2)[O:14][C@H:11]1[O:12][CH3:13])(=[O:43])[C:37]1[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1

Participants

5

Reactant 2

HCID 7412Benzoyl chlorideHCID 22956578HCID 22956578, compound

Product 1

HCID 69929399HCID 69929399, compoundYield 84%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

Methyl 3,4-di-O-benzyl-6-O-(4-chlorobenzyl)-β-D-glucopyranoside (0.244 g, 0.481 mmol) was dissolved in 5 mL CH2Cl2. Benzoyl chloride (67 μL, 0.577 mmol) and DMAP (0.118 g, 0.962 mmol) were added and the reaction mixture was stirred at room temperature for 1 h. A 30% EtOAc/Hexanes solution was added (a white precipitate formed) and the solution was filtered through silica, eluted with EtOAc and concentrated. Purification by flash column chromatography on silica gel (25-30% EtOAc/Hexanes) gave 243 mg (84%) of 21 as a white solid. [α]24D: +33.4° (c 1.29, CH2Cl2); IR (thin film) 2865, 1726, 1268, 1089 cm−1; 1H-NMR (CDCl3) δ 8.05 (d, J=7.0 Hz, 2H), 7.59 (t, J=7.3 Hz, 1H), 7.46 (t, J=7.9 Hz, 2H), 7.36-7.29 (m, 8H), 7.26-7.21 (m, 2H), 7.15 (s, 4H), 5.30 (dd, J=7.9, 9.2 Hz, 1H), 4.86 (d, J=10.7 Hz, 1H), 4.77 (d, J=11.0 Hz, 1H), 4.70 (d, J=11.0 Hz, 1H), 4.62 (d, J=12.2 Hz, 1H), 4.59 (d, J=11.0 Hz, 1H), 4.56 (d, J=12.5 Hz, 1H), 4.48 (d, J=7.9 Hz, 1H), 3.86 (dd, J=9.2, 9.2 Hz, 1H), 3.80-3.74 (m, 3H), 3.61-3.58 (m, 1H), 3.50 (s, 3H); 13C-NMR (CDCl3) δ 165.4, 138.0, 137.9, 136.8, 133.5, 133.3, 130.1, 130.0, 129.2, 128.7, 128.6, 128.5, 128.4, 128.2, 128.1, 128.0, 127.8, 102.1, 83.0, 78.1, 75.4, 75.3, 75.2, 73.9, 72.9, 68.9, 57.0; FAB MS m/z (M+Na)+: calcd 625.1969, obsd 625.1973.

Workup

  1. customformed) and the solution
  2. filtrationwas filtered through silica
  3. washeluted with EtOAc
  4. concentrationconcentrated
  5. customPurification by flash column chromatography on silica gel (25-30% EtOAc/Hexanes)

Sources & evidence

ORD record
ord-4ef231eb81e249fba030c17b70607116
Source dataset
uspto-grants-2002_07
Patent number
US06426421B1

Reaction notes

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