Triphenylphosphine → (5R)-3-[4-(3,6-dihydro-2H-pyran-4-yl)-3-fluoro-phenyl]-5-(1,2,5-thiadiazol-3-yloxymethyl)oxazolidin-2-one

HRID 1167494Notes

Reaction equation

HRID 1167494 reaction equation
CC(OC(/N=N/C(OC(C)C)=O)=O)C.[OH:15][CH2:16][C@@H:17]1[O:21][C:20](=[O:22])[N:19]([C:23]2[CH:28]=[CH:27][C:26]([C:29]3[CH2:30][CH2:31][O:32][CH2:33][CH:34]=3)=[C:25]([F:35])[CH:24]=2)[CH2:18]1.O[C:37]1[CH:41]=[N:40][S:39][N:38]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[S:39]1[N:40]=[CH:41][C:37]([O:15][CH2:16][C@@H:17]2[O:21][C:20](=[O:22])[N:19]([C:23]3[CH:28]=[CH:27][C:26]([C:29]4[CH2:30][CH2:31][O:32][CH2:33][CH:34]=4)=[C:25]([F:35])[CH:24]=3)[CH2:18]2)=[N:38]1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 186848415(R)-hydroxymethyl-3-(3-fluoro-4-(3,6-dihydro-(2H)-pyran-4-yl)phenyl)oxazolidin-2-oneHCID 178516825HCID 178516825, compound

Product 1

HCID 497388(5R)-3-[4-(3,6-dihydro-2H-pyran-4-yl)-3-fluoro-phenyl]-5-(1,2,5-thiadiazol-3-yloxymethyl)oxazolidin-2-oneYield 73%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Diisopropylazodicarboxylate (0.22 g, 1.1 mmol) was added dropwise at ambient temperature to a stirred solution of 5(R)-hydroxymethyl-3-(4-[3,6-dihydro-(2H)-pyran-4-yl]-3-fluorophenyl)oxazolidin-2-one (WO97/09328; 0.275 g, 0.93 mmol), 3-hydroxy1,2,5-thiadiazole (Weinstock et al. Journal of Organic Chemistry 32, 2823 [1967]; 0.1 12 g, 1.1 mmol) and triphenylphosphine (0.288 g, 1.1 mmol) in dry THF (7 ml). The solution was kept for 1.5 hours. Solvent was evaporated and the residue was purified by flash column chromatography, eluting with EtOAc/isohexane (1:1) to give the title product (0.256 g , 73%) as a solid (mp 146-148 ° C.). MS: 378 (MH+); NMR: 2.4 (1H, bs); 3.78 (3H, t); 3.96 (1H, m); 4.2 (3H, m); 4.66 (2H, m); 5.1 (1H, m); 6.05 (1H, s); 7.27-7.5 (3H, m); 8.41 (1H, s).

Workup

  1. customSolvent was evaporated
  2. customthe residue was purified by flash column chromatography
  3. washeluting with EtOAc/isohexane (1:1)

Sources & evidence

ORD record
ord-d5d6fc2d4e0648e9a2c190ca483d8838
Source dataset
uspto-grants-2003_09
Patent number
US06617339B1

Reaction notes

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