Methanesulfonic Acid → HCID 59557731, compound

HRID 1175286Notes

Reaction equation

HRID 1175286 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([Cl:8])=[C:4]([CH2:9][C:10]2[CH:15]=[CH:14][C:13]([CH2:16][CH2:17][CH2:18][O:19][CH:20]3[CH2:22][CH2:21]3)=[CH:12][CH:11]=2)[CH:3]=1.[Li][CH2:24]CCC.C[Si](C)(C)[O:30][C@@H:31]1[C@@H:36]([O:37][Si](C)(C)C)[C@H:35]([O:42][Si](C)(C)C)[C@@H:34]([CH2:47][O:48][Si](C)(C)C)[O:33][C:32]1=[O:53].CS(O)(=O)=O>C1(C)C=CC=CC=1.C1COCC1.C1(C)C=CC=CC=1.CO>[Cl:8][C:5]1[CH:6]=[CH:7][C:2]([C:32]2([O:53][CH3:24])[C@H:31]([OH:30])[C@@H:36]([OH:37])[C@H:35]([OH:42])[C@@H:34]([CH2:47][OH:48])[O:33]2)=[CH:3][C:4]=1[CH2:9][C:10]1[CH:15]=[CH:14][C:13]([CH2:16][CH2:17][CH2:18][O:19][CH:20]2[CH2:22][CH2:21]2)=[CH:12][CH:11]=1

Participants

8

Reactant 4

HCID 6395Methanesulfonic AcidHCID 10994280(3R,4S,5R,6R)-3,4,5-Tris-trimethylsilanyloxy-6-trimethylsilanyloxymethyl-tetrahydro-pyran-2-onHCID 59557763HCID 59557763, compoundHCID 178418339Butyllithium

Product 1

HCID 59557731HCID 59557731, compound

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 1140TolueneSolventHCID 22635083Tetrahydrofuran tolueneSolvent

Conditions

Temperature
-65 °C

Procedure

To a solution of 4-bromo-1-chloro-2-(4-(3-cyclopropoxypropyl)benzyl)benzene (0.64 g, 1.69 mmol) in anhydrous toluene/THF (6 mL, v/v=2:1) was added dropwise n-BuLi (2.5 M in hexane, 0.81 mL) at −65° C., and the mixture was stirred for 30 min at −65° C. Then a −65° C. solution of (3R,4S,5R,6R)-3,4,5-tris(trimethylsilyloxy)-6-((trimethylsilyloxy)methyl)tetrahydro-2H-pyran-2-one (0.86 g, 1.85 mmol) in toluene (6 mL) was added dropwise over 15 min. The mixture was stirred at −65° C. for 3.5 h until starting material was consumed. The reaction was quenched with methanesulfonic acid (0.23 mL, 3.58 mmol) in methanol (6 mL), and the mixture was allowed to warm to room temperature and stirred overnight. The reaction was quenched with saturated sodium bicarbonate, the organic phase was separated and the aqueous phase was extracted with ethyl acetate. The combined organic phases were washed with saturated bicarbonate, then with water, and then with brine, and dried over sodium sulfate. Removal of the volatiles afforded a residue (0.73 g), which was used in the next step without further purification.

Workup

  1. stirringThe mixture was stirred at −65° C. for 3.5 h
  2. customwas consumed
  3. temperatureto warm to room temperature
  4. stirringstirred overnight
  5. customThe reaction was quenched with saturated sodium bicarbonate
  6. customthe organic phase was separated
  7. extractionthe aqueous phase was extracted with ethyl acetate
  8. washThe combined organic phases were washed with saturated bicarbonate
  9. dry with materialwith water, and then with brine, and dried over sodium sulfate
  10. customRemoval of the volatiles

Sources & evidence

ORD record
ord-decd1284a30c48dc8aa009f25aa96234
Source dataset
uspto-grants-2010_11
Patent number
US07838499B2

Reaction notes

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