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 1901447Notes

Reaction equation

HRID 1901447 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 (1H, 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-89a952a0df1245d7be46c15ba217e027
Source dataset
uspto-grants-1996_11
Patent number
US05578591

Reaction notes

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