Morpholine → 8-[(2R)-1-(3,5-difluorophenyl)pyrrolidin-2-yl]-6-(morpholine-4-carbonyl)-2-morpholino-chromen-4-one

HRID 41184Notes

Reaction equation

HRID 41184 reaction equation
[B-](F)(F)(F)F.CN(C(ON1C(=O)CCC1=O)=[N+](C)C)C.[F:21][C:22]1[CH:23]=[C:24]([N:29]2[CH2:33][CH2:32][CH2:31][C@@H:30]2[C:34]2[CH:35]=[C:36]([C:51]([OH:53])=O)[CH:37]=[C:38]3[C:43]=2[O:42][C:41]([N:44]2[CH2:49][CH2:48][O:47][CH2:46][CH2:45]2)=[CH:40][C:39]3=[O:50])[CH:25]=[C:26]([F:28])[CH:27]=1.CCN(C(C)C)C(C)C.[NH:63]1[CH2:68][CH2:67][O:66][CH2:65][CH2:64]1>>[F:28][C:26]1[CH:25]=[C:24]([N:29]2[CH2:33][CH2:32][CH2:31][C@@H:30]2[C:34]2[CH:35]=[C:36]([C:51]([N:63]3[CH2:68][CH2:67][O:66][CH2:65][CH2:64]3)=[O:53])[CH:37]=[C:38]3[C:43]=2[O:42][C:41]([N:44]2[CH2:45][CH2:46][O:47][CH2:48][CH2:49]2)=[CH:40][C:39]3=[O:50])[CH:23]=[C:22]([F:21])[CH:27]=1

Participants

5

Reactant 4

HCID 8083MorpholineHCID 81531DiisopropylethylamineHCID 98575222-(2,5-Dioxopyrrolidin-1-yl)-1,1,3,3-tetramethylisouronium tetrafluoroborateHCID 866724108-[(2R)-1-(3,5-difluorophenyl)pyrrolidin-2-yl]-2-morpholino-4-oxo-chromene-6-carboxylic acid

Product 1

HCID 665579648-[(2R)-1-(3,5-difluorophenyl)pyrrolidin-2-yl]-6-(morpholine-4-carbonyl)-2-morpholino-chromen-4-oneYield 44%

Procedure

TSTU (106 mg, 0.33 mmol) was added in one portion to a stirred solution of 8-[(2R)-(1-(3,5-difluorophenyl)pyrrolidin-2-yl)]-2-morpholino-4-oxo-4H-chromene-6-carboxylic acid (144 mg, 0.30 mmol, >98% enantiomeric purity, made from the second eluting ester enantiomer from chiral separation of tert-butyl 2-(6-(methoxycarbonyl)-2-morpholino-4-oxo-4H-chromen-8-yl)pyrrolidine-1-carboxylate—see below) and DIPEA (0.057 mL, 0.33 mmol) at room temperature and the resulting mixture was stirred for 1.5 h. Morpholine (0.052 mL, 0.60 mmol) was then added to the reaction mixture and stirring was continued over the week-end. The reaction mixture was purified by preparative HPLC. The fractions were evaporated to dryness, the residue was dissolved in DCM, dried over MgSO4 and concentrated. The remaining solid was triturated with diethyl ether, filtered, washed with diethyl ether and dried under vacuum at 50° C. to afford 8-[(2R)-1-(3,5-difluorophenyl)pyrrolidin-2-yl]-6-(morpholine-4-carbonyl)-2-morpholino-chromen-4-one (69 mg, 44%) as a pale yellow solid.

Workup

  1. washsecond eluting ester enantiomer
  2. customfrom chiral separation of tert-butyl 2-(6-(methoxycarbonyl)-2-morpholino-4-oxo-4H-chromen-8-yl)pyrrolidine-1-carboxylate—
  3. customat room temperature
  4. stirringstirring
  5. customThe reaction mixture was purified by preparative HPLC
  6. customThe fractions were evaporated to dryness
  7. dissolutionthe residue was dissolved in DCM
  8. dry with materialdried over MgSO4
  9. concentrationconcentrated
  10. customThe remaining solid was triturated with diethyl ether
  11. filtrationfiltered
  12. washwashed with diethyl ether
  13. customdried under vacuum at 50° C.

Sources & evidence

ORD record
ord-4c7735e990e04bb7ade8d12b059d932d
Source dataset
uspto-grants-2013_09
Patent number
US08530470B2

Reaction notes

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