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1,8-Diazabicyclo(5.4.0)undec-7-ene → (-)-9-Fluoro-3(S)-methyl-10-[3-(1,2,4-triazol-1-yl) pyrrolidin-1-yl]-7-oxo-2,3-dihydro-7H-pyrido-[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid

HRID 1742964
Notes
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Reaction equation

HRID 1742964 reaction equation
[F:1][C:2]1[C:3](F)=[C:4]2[O:9][CH2:8][C@H:7]([CH3:10])[N:6]3[CH:11]=[C:12]([C:17]([OH:19])=[O:18])[C:13](=[O:16])[C:14]([CH:15]=1)=[C:5]23.Cl.[N:22]1([CH:27]2[CH2:31][CH2:30][NH:29][CH2:28]2)[CH:26]=[N:25][CH:24]=[N:23]1.C1CCN2C(=NCCC2)CC1>C(#N)C>[F:1][C:2]1[C:3]([N:29]2[CH2:30][CH2:31][CH:27]([N:22]3[CH:26]=[N:25][CH:24]=[N:23]3)[CH2:28]2)=[C:4]2[O:9][CH2:8][C@H:7]([CH3:10])[N:6]3[CH:11]=[C:12]([C:17]([OH:19])=[O:18])[C:13](=[O:16])[C:14]([CH:15]=1)=[C:5]23
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 688333Levofloxacin q-acidHCID 190059941-(pyrrolidin-3-yl)-1H-1,2,4-triazole hydrochloride

Product 1

HCID 53860290(-)-9-Fluoro-3(S)-methyl-10-[3-(1,2,4-triazol-1-yl) pyrrolidin-1-yl]-7-oxo-2,3-dihydro-7H-pyrido-[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid

Reagents, catalysts & solvents 1

HCID 6342
Acetonitrile
Solvent

Procedure

A suspension of 70.25 mg (0.25 mmol) of (-) -9,10-difluoro-3(S)-methyl-7-oxo-2,3-dihydro-7H-pyrido [1,2,3-de]-1,4-benzoxazine-6-carboxylic acid and 87 mg (0.5 mmol) of 3-(1,2,4-triazol-1-yl)pyrrolidine hydrochloride in 3 ml of acetonitrile in the presence of 76 mg (0.5 mmol) DBU was stirred under nitrogen at reflux condition overnight. The yellow solution was then evaporated to dryness and to the residue, water was added and solid collected. The off-white solid was dissolved in chloroform and the small amounts of the suspension were filtered off. The supernatant was evaporated and to the residue, water was added and solid collected (60 mg), m.p. 229°-231° C. 1H NMR (CDCl3) δ: 8.59 (s, 1H), 8.26 (s, 1H), 7.98 (s, 1H), 7.7 (d, 13.5Hz, 1H), 5.17-5.00 (m, 1H), 4.6-3.73 (m, 7H), 2.67-2.4 (m, 2H), 1.61 (d, 6.7Hz, 3H).

Workup

  1. temperatureat reflux condition overnight
  2. customThe yellow solution was then evaporated to dryness and to the residue, water
  3. additionwas added
  4. customsolid collected
  5. dissolutionThe off-white solid was dissolved in chloroform
  6. filtrationthe small amounts of the suspension were filtered off
  7. customThe supernatant was evaporated and to the residue, water
  8. additionwas added
  9. customsolid collected (60 mg), m.p. 229°-231° C

Sources & evidence

ORD record
ord-6bc681907c20481e894d9c29497a675a
Source dataset
uspto-grants-1994_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05342846

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes