Solketal → (2,2-Dimethyl-1,3-dioxolan-4-yl)methyl 1-cyclopropyl-6-fluoro-4-oxo-7-(4-propylpiperazin-1-yl)-1,4-dihydroquinoline-3-carboxylate

HRID 41818

Reaction equation

HRID 41818 reaction equation
[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:23])=[C:11]([N:14]4[CH2:19][CH2:18][N:17]([CH2:20][CH2:21][CH3:22])[CH2:16][CH2:15]4)[CH:12]=3)[C:7](=[O:24])[C:6]([C:25]([OH:27])=[O:26])=[CH:5]2)[CH2:3][CH2:2]1.[CH3:28][C:29]1([CH3:36])[O:33][CH:32]([CH2:34]O)[CH2:31][O:30]1.C(N(CC)CC)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>ClCCl>[CH:1]1([N:4]2[C:13]3[C:8](=[CH:9][C:10]([F:23])=[C:11]([N:14]4[CH2:19][CH2:18][N:17]([CH2:20][CH2:21][CH3:22])[CH2:16][CH2:15]4)[CH:12]=3)[C:7](=[O:24])[C:6]([C:25]([O:27][CH2:34][CH:32]3[CH2:31][O:30][C:29]([CH3:36])([CH3:28])[O:33]3)=[O:26])=[CH:5]2)[CH2:3][CH2:2]1

Participants

6

Reactant 4

HCID 7528SolketalHCID 8471TriethylamineHCID 4716651-Cyclopropyl-6-fluoro-4-oxo-7-(4-propylpiperazin-1-yl)quinoline-3-carboxylic acidHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Product 1

HCID 58455287(2,2-Dimethyl-1,3-dioxolan-4-yl)methyl 1-cyclopropyl-6-fluoro-4-oxo-7-(4-propylpiperazin-1-yl)-1,4-dihydroquinoline-3-carboxylateYield 89%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-cyclopropyl-6-fluoro-4-oxo-7-(4-propylpiperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid (8.86 g, 23.70 mmol) was dissolved in anhydrous dichloromethane (370 ml) under argon. 2,2-dimethyl-1,3-dioxolane-4-methanol (4.71 g, 35.60 mmol), triethylamine (9.59 g, 94.80 mmol) and HBTU (9.90 g, 26.10 mmol) were added and the reaction mixture was stirred at room temperature for three days (exclusion of light). The reaction mixture was washed with saturated NaHCO3 solution (500 ml), aqueous (pH 5) hydrochloric acid (500 ml) and water (500 ml) successively. The organic layer was dried over Na2SO4 and the solvent was removed under reduced pressure, yielding 10.28 g (89%) of a yellow solid.

Workup

  1. washThe reaction mixture was washed with saturated NaHCO3 solution (500 ml), aqueous (pH 5) hydrochloric acid (500 ml) and water (500 ml) successively
  2. dry with materialThe organic layer was dried over Na2SO4
  3. customthe solvent was removed under reduced pressure

Sources & evidence

ORD record
ord-e80040af873245e5a8f1caffa4a02975
Source dataset
uspto-grants-2013_09
Patent number
US08535655B2

Linked notes

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