Dimethyl Sulfoxide → (2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoro-ethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-carbaldehyde

HRID 1913075Notes

Reaction equation

HRID 1913075 reaction equation
C(Cl)(=O)C(Cl)=O.CS(C)=O.[CH2:11]([O:18][C@H:19]1[C@H:24]([O:25][CH2:26][C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C@@H:23]([O:33][CH2:34][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[C@@:22]([C:43]2[CH:48]=[CH:47][C:46]([Cl:49])=[C:45]([CH2:50][C:51]3[CH:56]=[CH:55][C:54]([O:57][CH2:58][CH:59]([F:61])[F:60])=[CH:53][CH:52]=3)[CH:44]=2)([O:41][CH3:42])[O:21][C@@H:20]1[CH2:62][OH:63])[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(N(CC)CC)C>C(Cl)Cl>[CH2:11]([O:18][C@H:19]1[C@H:24]([O:25][CH2:26][C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C@@H:23]([O:33][CH2:34][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)[C@@:22]([C:43]2[CH:48]=[CH:47][C:46]([Cl:49])=[C:45]([CH2:50][C:51]3[CH:52]=[CH:53][C:54]([O:57][CH2:58][CH:59]([F:60])[F:61])=[CH:55][CH:56]=3)[CH:44]=2)([O:41][CH3:42])[O:21][C@@H:20]1[CH:62]=[O:63])[C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 86685169[(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoro-ethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol

Product 1

HCID 86685170(2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoro-ethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-carbaldehydeYield 89.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Conditions

Temperature
-78 °C

Procedure

Oxalyl chloride (0.18 mL, 2.16 mmol) was dissolved in 5 mL methylene chloride and cooled to −78° C., followed by dropwise addition of a solution (3 mL) of dimethyl sulfoxide (0.23 mL, 3.31 mmol) in methylene chloride, and the reaction mixture was stirred for 15 minutes. 10 mL solution of [(2R,3R,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoroethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-yl]methanol 12h (1.23 g, 1.66 mmol) in methylene chloride were dropwise added before the mixture was stirred for 40 minutes. The reaction mixture was warmed to room temperature and stirred for 3 hours after triethylamine (1.2 mL, 8.31 mmol) was dropwise added. Thereafter, the reaction mixture was partitioned after 5 mL 1 M hydrochloric acid were added. The aqueous phase was extracted with ethyl acetate (20 mL×2) and the organic extract was combined, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure to obtain the title compound (2S,3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[[4-(2,2-difluoro-ethoxy)phenyl]methyl]phenyl]-6-methoxy-tetrahydropyran-2-carbaldehyde 12i (1.10 g, yellow grease), which was used directly in the next step without purification.

Workup

  1. stirringwas stirred for 40 minutes
  2. temperatureThe reaction mixture was warmed to room temperature
  3. additionwas dropwise added
  4. customThereafter, the reaction mixture was partitioned after 5 mL 1 M hydrochloric acid
  5. additionwere added
  6. extractionThe aqueous phase was extracted with ethyl acetate (20 mL×2)
  7. extractionthe organic extract
  8. dry with materialdried over anhydrous magnesium sulfate
  9. filtrationfiltered
  10. concentrationThe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-9c46da2442d54aa9be59562a5e2a9de6
Source dataset
uspto-grants-2013_12
Patent number
US08609622B2

Reaction notes

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