Citric Acid → HCID 90411475, compound

HRID 1754597Notes

Reaction equation

HRID 1754597 reaction equation
[C:1]1([CH3:11])[CH:6]=[CH:5][C:4]([S:7](Cl)(=[O:9])=[O:8])=[CH:3][CH:2]=1.[CH2:12]([O:19][CH2:20][C@H:21]([C@H:24]([O:26][Si:27]([C:30]([CH3:33])([CH3:32])[CH3:31])([CH3:29])[CH3:28])[CH3:25])[CH2:22][OH:23])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(OCC)(=O)C.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>N1C=CC=CC=1>[CH3:11][C:1]1[CH:6]=[CH:5][C:4]([S:7]([O:23][CH2:22][C@@H:21]([CH2:20][O:19][CH2:12][C:13]2[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=2)[C@H:24]([O:26][Si:27]([C:30]([CH3:33])([CH3:32])[CH3:31])([CH3:29])[CH3:28])[CH3:25])(=[O:9])=[O:8])=[CH:3][CH:2]=1

Participants

6

Reactant 4

HCID 311Citric AcidHCID 73974-Toluenesulfonyl chlorideHCID 8857Ethyl AcetateHCID 11067317(2R,3R)-2-((benzyloxy)methyl)-3-(tert-butyldimethylsiloxy)butan-1-ol

Product 1

HCID 90411475HCID 90411475, compound

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent2×

Procedure

p-Toluenesulfonyl chloride (1.4 g. 7.4 mmol) was added in one portion to a cold (ice/water bath) stirred solution of 4 (2.0 g, 6.16 mmol) in anhydrous pyridine (25 ml). The reaction was allowed to warm up to room temperature and stirred for 6 hrs until no starting material was found by HPLC analysis. Ethyl acetate (100 ml) and 10% citric acid (enough to neutralize pyridine) were added. The organic phase was washed with saturated NaCl, saturated NaHCO3 and dried over MgSO4. The crude tosylate 9 (2.9 g) was used in the next step without additional purification. 1H NMR (CDCl3): δ 7.80 (d, J=8.1 Hz, 2H). 7.40-7.25 (m, 7H), 4.41 (d, J=3.6 Hz, 2H), 4.25 (m, 1H), 4.11 (m, 1H), 3.98 (m, 1H), 3.45 (m, 2H), 2.45 (s, 3H), 1.96 (m, 1H), 1.12 (d, J=6.3 Hz, 3H), 0.83 (s, 9H), 0.036 (s, 3H), 0.00 (s, 3H).

Workup

  1. additionwere added
  2. washThe organic phase was washed with saturated NaCl, saturated NaHCO3
  3. dry with materialdried over MgSO4
  4. customThe crude tosylate 9 (2.9 g) was used in the next step without additional purification

Sources & evidence

ORD record
ord-09dc76da97d5471bab790ce85632f0de
Source dataset
uspto-grants-2015_10
Patent number
US09169256B2

Reaction notes

Loading…