Methanesulfonyl chloride → (4-methoxyphenyl)methyl (6S,7S)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(oxolan-2-yl)-4-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

HRID 581207Notes

Reaction equation

HRID 581207 reaction equation
[NH2:1][C:2]1[S:3][CH:4]=[C:5](/[C:7](=[N:11]/[O:12][CH3:13])/[C:8]([OH:10])=O)[N:6]=1.C(N(CC)C(C)C)(C)C.CS(Cl)(=O)=O.[O:28]=[C:29]1[N:36]2[C@H:31]([CH2:32][O:33][C:34]([CH:49]3[CH2:53][CH2:52][CH2:51][O:50]3)=[C:35]2[C:37]([O:39][CH2:40][C:41]2[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[CH:43][CH:42]=2)=[O:38])[C@@H:30]1[NH:54]C(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>CN(C)C=O.N1C=CC=CC=1>[NH2:1][C:2]1[S:3][CH:4]=[C:5](/[C:7](=[N:11]/[O:12][CH3:13])/[C:8]([NH:54][C@@H:30]2[C:29](=[O:28])[N:36]3[C@@H:31]2[CH2:32][O:33][C:34]([CH:49]2[CH2:53][CH2:52][CH2:51][O:50]2)=[C:35]3[C:37]([O:39][CH2:40][C:41]2[CH:42]=[CH:43][C:44]([O:47][CH3:48])=[CH:45][CH:46]=2)=[O:38])=[O:10])[N:6]=1

Participants

7

Reactant 4

HCID 31297Methanesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 5486924(alphaZ)-2-Amino-alpha-(methoxyimino)-4-thiazoleacetic acidHCID 57284977HCID 57284977, compound

Product 1

HCID 140399827(4-methoxyphenyl)methyl (6S,7S)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(oxolan-2-yl)-4-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylateYield 107%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6228DimethylformamideSolvent2×

Procedure

A stirred mixture of 2-(Z)-methoxyimino-2-(2-aminothiazol-4-yl)acetic acid (III) (54 mg) and N,N-diisopropylethylamine (0.047 ml) in dimethylformamide (0.3 ml) was cooled to -55° to -60° C. and methanesulphonyl chloride (0.021 ml) was added. The mixture was stirred at the same temperature for 0.5 h and then a solution of 4-methoxybenzyl (6S,7S)-7-amino-8-oxo-3-(tetrahydrofuran-2-yl)-1-aza-4-oxabicyclo[4.2.0]oct-2-ene-2-carboxylate (II) (91 mg) in dimethylformamide (1 ml) was added, followed by pyridine (0.022 ml). The mixture was then stirred at 0° C. for 1 h and then at room temperature for 0.5 h. The mixture was partitioned between ethyl acetate and aqueous citric acid solution and the organic phase was washed twice with water, then brine, dried over magnesium sulphate and evaporated. Column chromatography (silica gel, ethyl acetate as eluent) gave the title compound (88 mg). νmax (CHCl3) 1769, 1709, 1679 and 1613 cm-1 ; δ(CDCl3) 1.72-2.12 (4H, m), 3.35 (3H, s), 3.68-3.96 (4H, m), 3.76 (3H, s), 4.64 (1H, dd, J 9.19 and 15.89 Hz), 5.13 (3H, s), 5.20 (1H, t, J 6.77 Hz), 5.72 (1H, dd, J 4.14 and 8.91 Hz), 6.80 (1 H, s), 6.93 (2H, d, J 8.68 Hz), 7.24 (2H, s), 7.37 (2H, d, J 8.66 Hz), 9.23 (1H, d, J 9 Hz).

Workup

  1. temperaturewas cooled to -55° to -60° C.
  2. stirringThe mixture was then stirred at 0° C. for 1 h
  3. waitat room temperature for 0.5 h
  4. customThe mixture was partitioned between ethyl acetate and aqueous citric acid solution
  5. washthe organic phase was washed twice with water
  6. dry with materialbrine, dried over magnesium sulphate
  7. customevaporated

Sources & evidence

ORD record
ord-62396ebe26684e95b8f9d364f32f68de
Source dataset
uspto-grants-1999_07
Patent number
US05919925

Reaction notes

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