Methanesulfonyl chloride → (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetyl]amino]-3-[(Z)-(3-methoxy-4-methyl-5-oxofuran-2-ylidene)methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

HRID 973875ノート

反応式

HRID 973875 の反応式
C([NH:20][C:21]1[S:22][CH:23]=[C:24](/[C:26](=[N:30]/[O:31]C(C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)/[C:27]([O-:29])=O)[N:25]=1)(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Na+].CS(Cl)(=O)=O.[NH2:57][C@@H:58]1[C:91](=[O:92])[N:60]2[C:61]([C:75]([O:77]C(C3C=CC=CC=3)C3C=CC=CC=3)=[O:76])=[C:62](/[CH:65]=[C:66]3/[C:67]([O:73][CH3:74])=[C:68]([CH3:72])[C:69](=[O:71])[O:70]/3)[CH2:63][S:64][C@H:59]12>CN(C=O)C.C(OCC)(=O)C>[NH2:20][C:21]1[S:22][CH:23]=[C:24](/[C:26](=[N:30]/[OH:31])/[C:27]([NH:57][C@@H:58]2[C:91](=[O:92])[N:60]3[C:61]([C:75]([OH:77])=[O:76])=[C:62](/[CH:65]=[C:66]4/[C:67]([O:73][CH3:74])=[C:68]([CH3:72])[C:69](=[O:71])[O:70]/4)[CH2:63][S:64][C@H:59]23)=[O:29])[N:25]=1

参加物

6

反応物 3

HCID 31297Methanesulfonyl chlorideHCID 23714200sodium (2Z)-2-[2-(tritylamino)-1,3-thiazol-4-yl]-2-trityloxyiminoacetateHCID 67923960diphenylmethyl 7beta-amino-3-(Z-2,5-dihydro-4-methoxy-3-methyl-2-oxofuran-5-ylidenemethyl)ceph-3-em-4-carboxylate

生成物 1

HCID 88512320(6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-hydroxyiminoacetyl]amino]-3-[(Z)-(3-methoxy-4-methyl-5-oxofuran-2-ylidene)methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid収率 81%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒2 回HCID 8857Ethyl Acetate溶媒

反応条件

温度
-15 °C

実験手順

Sodium 2-(2-tritylaminothiazol-4-yl)-2-Z-trityloxyiminoacetate (0.759 g), in dry DMF (5 mls) was cooled to ca -50° C. under argon. This solution was treated with methanesulphonyl chloride (0.085 mls) and allowed to warm to -15° C. A solution of diphenylmethyl 7β-amino-3-(Z-2,5-dihydro-4-methoxy-3-methyl-2-oxofuran-5-ylidenemethyl)ceph-3-em-4-carboxylate, (0.46 g) in dry DMF (5 mls) was added, and the solution allowed to reach room temperature over 1 h. The solution was diluted with ethl acetate and washed with water, brine and then dried. After removal of solvent the residue was flash chromatographed on silica gel eluting with 50% ethyl acetate/hexane to give the title compound as a yellow foam, (0.375 g, 36%), νmax 3380, 1770(br), 1725, 1685, 1630, 1505(br), 1440, 1370 and 1345cm-1 ; δH (CDCl3) 2.07 (3H,s), 3.74 and 3.96 (2H,ABq, J18.3Hz, sharpens on D2O shake), 5.08 (1H, m, sharpens to d, J5.0Hz on D2O shake), 6.12 (1H, br.m, sharpens to d, J5.0Hz on D2O shake), 6.43 (1H, br.s, sharpens on D2O shake), 6.74 (1H, s), 6.78 (1H, br.s, exch.), 6.98 (1H, s) and 7.20 to 7.55 (40H, m, arom-H); [mass spectrum: +ve ion (NOBA, Na+) MNa+, 1180].

後処理

  1. washwashed with water, brine
  2. customdried
  3. customAfter removal of solvent the residue
  4. customchromatographed on silica gel eluting with 50% ethyl acetate/hexane

出典と根拠

ORDレコード
ord-65c68cc9887248d0b737782433fbe60d
出典データセット
uspto-grants-1991_11
特許番号
US05064649

反応ノート

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