Trifluoroacetic acid → [(1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]methanol

HRID 1912996Notes

Reaction equation

HRID 1912996 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]C2C=CC=CC=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][CH3:48])=[C:43]([F:49])[C:42]=3[F:50])[CH:34]=2)([O:31][CH3:32])[O:11][C:10]1(CO)[CH2:51][OH:52])C1C=CC=CC=1.F[C:56](F)(F)[C:57](O)=O>ClCCl>[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:57]2[CH:56]=[CH:51][CH:10]=[CH:9][CH:14]=2)[C@:12]2([C:33]3[CH:38]=[CH:37][C:36]([Cl:39])=[C:35]([CH2:40][C:41]4[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[C:43]([F:49])[C:42]=4[F:50])[CH:34]=3)[O:11][C@@:10]1([CH2:51][OH:52])[CH2:32][O:31]2)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 68015201[(3S,4S,5R,6S)-3,4,5-tri-benzyloxy-6-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol

Product 1

HCID 86685114[(1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]methanolYield 149.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

[(3S,4S,5R,6S)-3,4,5-tribenzyloxy-6-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-2-(hydroxymethyl)-6-methoxy-tetrahydropyran-2-yl]methanol 2n (500 mg, 0.66 mmol) was dissolved in 10 mL dichloromethane, followed by dropwise addition of trifluoroacetic acid (0.2 mL, 2.62 mmol). The reaction mixture was stirred for 1.5 hours. Thereafter, the reaction mixture was washed with 10 mL saturated sodium bicarbonate solution and the organic extract was combined, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was purified by silica gel chromatography with elution system B to obtain the title compound [(1S,2S,3S,4R,5S)-2,3,4-tribenzyloxy-5-[4-chloro-3-[(2,3-difluoro-4-methoxy-phenyl)methyl]phenyl]-6,8-dioxabicyclo[3.2.1]octan-1-yl]methanol 2p (360 mg, white solid), with yield: 75.3%. MS m/z (ESI): 746.2 [M+18].

Workup

  1. washThereafter, the reaction mixture was washed with 10 mL saturated sodium bicarbonate solution
  2. extractionthe organic extract
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe resulting residue was purified by silica gel chromatography with elution system B

Sources & evidence

ORD record
ord-4d5cd2980c8147f5b9e708b1dc200639
Source dataset
uspto-grants-2013_12
Patent number
US08609622B2

Reaction notes

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