Hydrochloric Acid → Diphenylmethyl 3-(2-acetylhydrazono)methyl-7-(2-thienylacetamido)-3-cephem-4-carboxylate
Reaction equation
[CH:1]([C:3]1[CH2:4][S:5][C@@H:6]2[CH:26]([NH:27][C:28](=[O:35])[CH2:29][C:30]3[S:31][CH:32]=[CH:33][CH:34]=3)[C:25](=[O:36])[N:7]2[C:8]=1[C:9]([O:11][CH:12]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)=[O:10])=O.[C:37]([NH:40][NH2:41])(=[O:39])[CH3:38].Cl>O1CCCC1.O>[C:37]([NH:40][N:41]=[CH:1][C:3]1[CH2:4][S:5][C@@H:6]2[CH:26]([NH:27][C:28](=[O:35])[CH2:29][C:30]3[S:31][CH:32]=[CH:33][CH:34]=3)[C:25](=[O:36])[N:7]2[C:8]=1[C:9]([O:11][CH:12]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)[C:13]1[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1)=[O:10])(=[O:39])[CH3:38]Participants
6
Reactant 3
Product 1
Reagents, catalysts & solvents 2
Procedure
In a procedure similar to that described in Example I-3, diphenylmethyl 3-formyl-7-(2-thienylacetamido)-3-cephem-4-carboxylate (104 mg) and acetylhydrazine (30 mg) are left to react in a mixture of tetrahydrofuran (8 ml) and water (1.51 ml) in the presence of hydrochloric acid (2 equivalents) at room temperature overnight to give diphenylmethyl 3-(2-acetylhydrazono)methyl-7-(2-thienylacetamido)-3-cephem-4-carboxylate (101 mg). m.p. 130-138° C. Yield: 88%. IR: νmaxNujol 3250, 1782, 1715, 1670, 1597, 1535 cm-1. UV: λmaxEtOH 327nm(ε=24000). NMR: δCDCl 3 (60MHz) 220s3H, 3.72ABq(39;18Hz)2H, 3.82s2H, 5.00d(5Hz)1H, 5.87dd (9;5Hz)1H, 6.77-7.58ml5H, 8.05s1H, 9.65s1H. [α]D23 -258° (c= 0.493,CHCl3).
Workup
- waitare left
Sources & evidence
- ORD record
- ord-46b7b99f0a2641d09cf75e49dad5d498
- Source dataset
- uspto-grants-1978_07
- Patent number
- US04101658
Reaction notes
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