Boron trifluoride → HCID 52913740, compound

HRID 1695879Notes

Reaction equation

HRID 1695879 reaction equation
[CH2:1]([N:8]1[C:17]2[C:12](=[CH:13][CH:14]=[C:15]([CH2:18][C:19]3[CH:20]=[C:21]([C@@:28]4(OC)[C@H:33]([OH:34])[C@@H:32]([OH:35])[C@H:31]([OH:36])[C@@H:30]([CH2:37][OH:38])[O:29]4)[CH:22]=[CH:23][C:24]=3[CH:25]([CH3:27])[CH3:26])[CH:16]=2)[CH2:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([SiH](CC)CC)C.B(F)(F)F>C(#N)C.ClC(Cl)C>[CH2:1]([N:8]1[C:17]2[C:12](=[CH:13][CH:14]=[C:15]([CH2:18][C:19]3[CH:20]=[C:21]([C@H:28]4[C@H:33]([OH:34])[C@@H:32]([OH:35])[C@H:31]([OH:36])[C@@H:30]([CH2:37][OH:38])[O:29]4)[CH:22]=[CH:23][C:24]=3[CH:25]([CH3:27])[CH3:26])[CH:16]=2)[CH2:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6356Boron trifluorideHCID 12052TriethylsilaneHCID 67115966(2S,3R,4S,5S,6R)-2-[3-(1-benzyl-1,2,3,4-tetrahydro-quinolin-7-ylmethyl)-4-isopropyl-phenyl]-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol

Product 1

HCID 52913740HCID 52913740, compoundYield 88.2%

Reagents, catalysts & solvents 1

HCID 21218066Acetonitrile dichloroethaneSolvent

Conditions

Temperature
-55 °C

Procedure

To a stirred solution of (2S,3R,4S,5S,6R)-2-[3-(1-benzyl-1,2,3,4-tetrahydro-quinolin-7-ylmethyl)-4-isopropyl-phenyl]-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol (1.20 g, 2.19 mmol) in acetonitrile-dichloroethane 1:1 (20 mL) was added triethylsilane (1.39 mL, 8.76 mmol) at room temperature, then the reaction mixture cooled to −50 to −60° C. and boron trifluoride diethyletharate complex (0.55 mL, 4.38 mmol) was added dropwise, and the reaction mixture was stirred at same temperature and allowed to stir at below −30° C. for 2 hours and at −20° C. for 1 hour and then below 0° C. for 1 hour. The reaction was quenched with aq. saturated NaHCO3 solution (20 mL). The volatiles were evaporated under reduced pressure, and the resulting mixture was extracted with ethyl acetate (3×20 mL). The organic layers were combined and washed with brine (5 mL), dried over sodium sulphate, and concentrated to furnish (2S,3R,4R,5S,6R)-2-[3-(1-Benzyl-1,2,3,4-tetrahydro-quinolin-7-ylmethyl)-4-isopropyl-phenyl]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol (1.0 g). Crude product was used for next step without purification.

Workup

  1. stirringto stir at below −30° C. for 2 hours and at −20° C. for 1 hour
  2. customThe reaction was quenched with aq. saturated NaHCO3 solution (20 mL)
  3. customThe volatiles were evaporated under reduced pressure
  4. extractionthe resulting mixture was extracted with ethyl acetate (3×20 mL)
  5. washwashed with brine (5 mL)
  6. dry with materialdried over sodium sulphate
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-db9be35c66524d809c1a517b96379a65
Source dataset
uspto-grants-2012_04
Patent number
US08163704B2

Reaction notes

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