Trimethylsilylacetylene → HCID 59488880, compound

HRID 2402977Notes

Reaction equation

HRID 2402977 reaction equation
[N:1]([CH2:4][C@@H:5]1[O:9][C:8](=[O:10])[N:7]([C:11]2[CH:16]=[CH:15][C:14]([I:17])=[C:13]([F:18])[CH:12]=2)[CH2:6]1)=[N+:2]=[N-:3].[CH3:19][Si:20]([C:23]#[CH:24])([CH3:22])[CH3:21]>C1COCC1>[F:18][C:13]1[CH:12]=[C:11]([N:7]2[CH2:6][C@H:5]([CH2:4][N:1]3[CH:24]=[C:23]([Si:20]([CH3:22])([CH3:21])[CH3:19])[N:3]=[N:2]3)[O:9][C:8]2=[O:10])[CH:16]=[CH:15][C:14]=1[I:17]

Participants

4

Reactant 2

HCID 66111TrimethylsilylacetyleneHCID 23626594(5R)-5-(Azidomethyl)-3-(3-fluoro-4-iodophenyl)-1,3-oxazolidin-2-one

Product 1

HCID 59488880HCID 59488880, compoundYield 100%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of (5R)-5-azidomethyl-3-(3-fluoro-4-iodophenyl)-oxazolidin-2-one (1023, 248.0 g, 685.0 mmol) in anhydrous THF (600 mL) was treated with trimethylsilylacetylene (100.9 g, 145.2 mL, 1027.6 mmol, 1.5 equiv) at room temperature, and the resulting reaction mixture was warmed up to reflux for 12 h. When TLC and HPLC/MS showed that the cycloaddition reaction was complete, the reaction mixture was cooled down to room temperature before being concentrated in vacuo. The residue was further dried in vacuo to afford the crude, desired (5R)-3-(3-fluoro-4-iodo-phenyl)-5-(4-trimethylsilanyl-[1,2,3]triazol-1-ylmethyl)-oxazolidin-2-one (1024, 315.1 g, 315.1 g theoretical, 100%) as brown oil, which was directly used in the subsequent reaction without further purification. For 1024: 1H NMR (300 MHz, DMSO-d6) δ 0.01 (s, 9H, SiCH3), 3.67 (dd, 1H, J=6.4, 9.2 Hz), 4.01 (t, 1H, J=5.4 Hz), 4.59 (d, 2H, J=4.9 Hz), 4.91-4.94 (m, 1H), 6.88 (dd, 1H, J=2.4, 8.7 Hz), 7.22 (dd, 1H, J=2.4, 8.7 Hz), 7.58 (dd, 1H, J=7.5, 8.7 Hz), 7.73 (s, 1H, triazole-H); C15H18FN4O2Si, LCMS (EI) m/e 461 (M++H).

Workup

  1. customthe resulting reaction mixture
  2. temperaturewas warmed up
  3. temperatureto reflux for 12 h
  4. customWhen TLC and HPLC/MS showed that the cycloaddition reaction
  5. concentrationbefore being concentrated in vacuo
  6. customThe residue was further dried in vacuo

Sources & evidence

ORD record
ord-e220cff928fb48b1b72f988ba4c81e8c
Source dataset
uspto-grants-2014_08
Patent number
US08796465B2

Reaction notes

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