Trifluoroacetic acid → (4R,5R)-5-fluoro-4-[2-fluoro-5-(2-methoxy-phenylamino)-phenyl]-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-ylamine

HRID 1626113Notes

Reaction equation

HRID 1626113 reaction equation
COC1C=CC(C([NH:24][C:25]2[O:26][CH2:27][C@H:28]([F:48])[C@:29]([C:32]3[CH:37]=[C:36]([NH:38][C:39]4[CH:44]=[CH:43][CH:42]=[CH:41][C:40]=4[O:45][CH3:46])[CH:35]=[CH:34][C:33]=3[F:47])([CH3:31])[N:30]=2)(C2C=CC(OC)=CC=2)C2C=CC=CC=2)=CC=1.FC(F)(F)C(O)=O>ClCCl>[F:48][C@H:28]1[CH2:27][O:26][C:25]([NH2:24])=[N:30][C@@:29]1([C:32]1[CH:37]=[C:36]([NH:38][C:39]2[CH:44]=[CH:43][CH:42]=[CH:41][C:40]=2[O:45][CH3:46])[CH:35]=[CH:34][C:33]=1[F:47])[CH3:31]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71008803[bis-(4-methoxy-phenyl)-phenyl-methyl]-{(4R,5R)-5-fluoro-4-[2-fluoro-5-(2-methoxy-phenylamino)-phenyl]-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-yl}-amine

Product 1

HCID 71008880(4R,5R)-5-fluoro-4-[2-fluoro-5-(2-methoxy-phenylamino)-phenyl]-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-ylamineYield 82.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of [bis-(4-methoxy-phenyl)-phenyl-methyl]-{(4R,5R)-5-fluoro-4-[2-fluoro-5-(2-methoxy-phenylamino)-phenyl]-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-yl}-amine (49.8 mg, 76.6 μmol) in dichloromethane (2 ml) was treated at room temperature with trifluoroacetic acid (89.2 mg, 59.9 μl, 766 μmol), and the mixture was stirred for 15 hours. After evaporation at reduced pressure, the dark red residue was purified by chromatography on a silica-NH2 phase using a gradient of heptane/ethyl acetate=100:0 to 50:50 as the eluent. The (4R,5R)-5-fluoro-4-[2-fluoro-5-(2-methoxy-phenylamino)-phenyl]-4-methyl-5,6-dihydro-4H-[1,3]oxazin-2-ylamine (22 mg, 82% yield) was obtained as a white foam. MS (ISP): m/z=348.2 [M+H]+.

Workup

  1. customAfter evaporation at reduced pressure
  2. customthe dark red residue was purified by chromatography on a silica-NH2 phase

Sources & evidence

ORD record
ord-b06a5a8f287c4a909a34d17f0ad89f59
Source dataset
uspto-grants-2014_07
Patent number
US08785436B2

Reaction notes

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