Sodium borohydride → [(3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol

HRID 1913077Notes

Reaction equation

HRID 1913077 reaction equation
[CH2:1]([O:8][C@H:9]1[C@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@:12]([C:33]2[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]3[CH:46]=[CH:45][C:44]([O:47][CH2:48][CH:49]([F:51])[F:50])=[CH:43][CH:42]=3)[CH:34]=2)([O:31][CH3:32])[O:11][C@:10]1([CH2:54][OH:55])[CH:52]=[O:53])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[BH4-].[Na+]>O>[CH2:1]([O:8][C@H:9]1[C@H:14]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C@@H:13]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C@@:12]([C:33]2[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]3[CH:42]=[CH:43][C:44]([O:47][CH2:48][CH:49]([F:51])[F:50])=[CH:45][CH:46]=3)[CH:34]=2)([O:31][CH3:32])[O:11][C:10]1([CH2:54][OH:55])[CH2:52][OH:53])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 86685171(2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-carbaldehyde

Product 1

HCID 86685172[(3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanolYield 27%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

(2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-carbaldehyde 12j (1.09 g, 1.42 mmol) was dissolved in 30 mL of mixed solution (THF and MeOH, v:v=1:2), followed by addition of sodium borohydride (108 mg, 2.83 mmol) in batch. The reaction mixture was stirred for 30 minutes before 20 mL water and 30 mL water were added. The aqueous phase was extracted with ethyl acetate (30 mL×3) and the organic extract was washed with saturated sodium chloride solution (30 mL) and combined, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was purified by column chromatography to obtain the title compound [(3S,4S,5R,6S)-3,4,5-tribenzyl-oxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol 12k (293 mg, yellow grease), yield: 27.0%.

Workup

  1. additionwere added
  2. extractionThe aqueous phase was extracted with ethyl acetate (30 mL×3)
  3. extractionthe organic extract
  4. washwas washed with saturated sodium chloride solution (30 mL)
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated under reduced pressure
  8. customthe resulting residue was purified by column chromatography

Sources & evidence

ORD record
ord-1ff3eee961c349edb0dee27a50685802
Source dataset
uspto-grants-2013_12
Patent number
US08609622B2

Reaction notes

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