Sulfuric Acid → HCID 53880641, compound

HRID 565162Notes

Reaction equation

HRID 565162 reaction equation
C1C=C[NH+]=CC=1.C1C=C[NH+]=CC=1.[O-][Cr](O[Cr]([O-])(=O)=O)(=O)=O.[CH2:22]([O:29][C@@H:30]1[C@@H:35]([O:36][CH2:37][C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)[C@H:34]([O:44][CH2:45][C:46]2[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=2)[C@@H:33]([CH2:52][O:53][CH2:54][C:55]2[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=2)[O:32][C@H:31]1[O:61][CH2:62][CH2:63][CH2:64][CH2:65][CH2:66][CH2:67][CH2:68][CH2:69][CH2:70][CH2:71][OH:72])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(Cl)Cl.S(=O)(=O)(O)O>C(O)C>[CH2:22]([O:29][C@@H:30]1[C@@H:35]([O:36][CH2:37][C:38]2[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=2)[C@H:34]([O:44][CH2:45][C:46]2[CH:47]=[CH:48][CH:49]=[CH:50][CH:51]=2)[C@@H:33]([CH2:52][O:53][CH2:54][C:55]2[CH:60]=[CH:59][CH:58]=[CH:57][CH:56]=2)[O:32][C@H:31]1[O:61][CH2:62][CH2:63][CH2:64][CH2:65][CH2:66][CH2:67][CH2:68][CH2:69][CH2:70][CH:71]=[O:72])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1

Participants

6

Reactant 4

HCID 1118Sulfuric AcidHCID 6344DichloromethaneHCID 2724130Cornforth reagent2×HCID 21968895HCID 21968895, compound2×

Product 1

HCID 53880641HCID 53880641, compoundYield 74%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

PDC oxidation of 10-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyloxy)-n-decanol. Under an atmosphere of nitrogen, pyridinium dichromate (220 mg, 0.585 mmol) was added to a dry methylene chloride solution (6 mL) of 10-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyloxy)-n-decanol (275 mg, 0.395 mmol). The resulting brown slurry was stirred at room temperature under nitrogen. TLC analysis (visualization by UV and char with 10% sulfuric acid in ethanol) of the reaction mixture indicated complete consumption of the starting material and the formation of a new compound after 16 h. The reaction mixture was treated with ether (10 mL), filtered through silica gel and Celite with an ether wash (25 mL) and concentrated to an off-white oil. Chromatographic purification (silica gel, 20% ethyl acetate in hexanes) afforded 204 mg (0.294 mmol, 74%) of 10-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyloxy)-n-decanal as a clear oil. Rf=0.40 (silica gel, 30% ethyl acetate in hexanes); 1H NMR (CDCl3, 300 MHz) δ: 9.75 (t, J=1.8 Hz, 1H), 7.32 (m, 20H), 4.98 (dd, J=10.8, 9.6 Hz, 2H), 4.84 (t, J=10.5 Hz, 2H), 4.75 (d, J=10.8 Hz, 1H), 4.61 (d, J=8.4 Hz, 1H), 4.56 (dd, J=10.8, 6.0 Hz, 1H), 4.43 (d, J=7.8, 1H), 4.00 (m, 1H), 3.8-3.4 (m, 8H), 2.40 (dt, J=7.2, 1.5 Hz, 2H), 1.70 (m, 6H), 1.31, (m, 10H); MS (FAB+): 701.0 ((M+Li)+, 100), 609.0 (4), 455.0 (5), 423.1 (7), 181.1 (35), 160.0 (10), 107.0 (4), 105.0 (5).

Workup

  1. customconsumption of the starting material
  2. additionThe reaction mixture was treated with ether (10 mL)
  3. filtrationfiltered through silica gel and Celite with an ether
  4. washwash (25 mL)
  5. concentrationconcentrated to an off-white oil
  6. customChromatographic purification (silica gel, 20% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-78507515480545d6bf97b1442b90ddec
Source dataset
uspto-grants-2001_01
Patent number
US06171614B2

Reaction notes

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