2,2,2-Trifluoroethanol → HCID 66649805, compound

HRID 420307Notes

Reaction equation

HRID 420307 reaction equation
[C:1]([O:5][C:6](=[O:27])[NH:7][C@@H:8]1[C@@H:13]([OH:14])[C@H:12]([CH2:15][C:16]2[CH:21]=[C:20]([F:22])[C:19]([N+:23]([O-:25])=[O:24])=[C:18](F)[CH:17]=2)[CH2:11][S:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].[F:28][C:29]([F:33])([F:32])[CH2:30][OH:31].[OH-].[K+]>>[C:1]([O:5][C:6](=[O:27])[NH:7][C@@H:8]1[C@@H:13]([OH:14])[C@H:12]([CH2:15][C:16]2[CH:17]=[C:18]([O:31][CH2:30][C:29]([F:33])([F:32])[F:28])[C:19]([N+:23]([O-:25])=[O:24])=[C:20]([F:22])[CH:21]=2)[CH2:11][S:10][CH2:9]1)([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 3

HCID 64092,2,2-TrifluoroethanolHCID 14797Potassium HydroxideHCID 57386308[(3R,4S,5S)-5-(3,5-difluoro-4-nitro-benzyl)-4-hydroxy-tetrahydro-thiopyran-3-yl]-carbamic acid tert-butyl ester

Product 1

HCID 66649805HCID 66649805, compound

Conditions

Temperature
70 °C

Procedure

To a solution of [(3R,4S,5S)-5-(3,5-difluoro-4-nitro-benzyl)-4-hydroxy-tetrahydro-thiopyran-3-yl]-carbamic acid tert-butyl ester (5.0 g, 12.1 mmol, example 24f) and 2,2,2-trifluoroethanol (24.49 g, 242 mmol) was added pulverized KOH (0.694 g, 12.1 mmol) and the reaction mixture was heated at 70° C. for 3 h. The reaction mixture was evaporated and after addition of ice-water the product was extracted with EtOAc. Combined organic extracts were washed with brine, dried over MgSO4, filtered and concentrated to provide the title compound after crystallization from Et2O-hexane as light yellow crystals: TLC (toluene-EtOAc 3:1) Rf=0.17; HPLC RtA=2.28 min; ESIMS [M+H-isobutylene]+=429; 1H NMR (600 MHz, DMSO-d6): δ 7.13 (s, 1H), 7.10 (d, 1H), 6.76 (d, 1H), 5.10 (s, 1H), 5.01 (m, 2H), 3.37 (m, 1H), 3.19 (dd, 1H), 2.92 (dd, 1H), 2.55 (d, 1H), 2.48 (dd, 1H), 2.37 (dd, 1H), 2.31 (d, 1H), 2.25 (dd, 1H), 1.95 (m, 1H), 1.38 (s, 9H).

Workup

  1. customThe reaction mixture was evaporated
  2. additionafter addition of ice-water the product
  3. extractionwas extracted with EtOAc
  4. washCombined organic extracts were washed with brine
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-5734517ffdb84f1aab52507bcf120a2b
Source dataset
uspto-grants-2012_01
Patent number
US08093406B2

Reaction notes

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