Phenylacetyl isocyanate → 4-[2-(Azetidin-1-yl)ethyl]piperazine-1-carboxylic acid {4-[2-fluoro-4-(3-phenylacetylureido)phenoxy]pyridin-2-yl}amide

HRID 492984Notes

Reaction equation

HRID 492984 reaction equation
[NH2:1][C:2]1[CH:29]=[CH:28][C:5]([O:6][C:7]2[CH:12]=[CH:11][N:10]=[C:9]([NH:13][C:14]([N:16]3[CH2:21][CH2:20][N:19]([CH2:22][CH2:23][N:24]4[CH2:27][CH2:26][CH2:25]4)[CH2:18][CH2:17]3)=[O:15])[CH:8]=2)=[C:4]([F:30])[CH:3]=1.[C:31]1([CH2:37][C:38]([N:40]=[C:41]=[O:42])=[O:39])[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1>CN(C)C=O.CCCCCC.C(OCC)C>[F:30][C:4]1[CH:3]=[C:2]([NH:1][C:41]([NH:40][C:38](=[O:39])[CH2:37][C:31]2[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=2)=[O:42])[CH:29]=[CH:28][C:5]=1[O:6][C:7]1[CH:12]=[CH:11][N:10]=[C:9]([NH:13][C:14]([N:16]2[CH2:21][CH2:20][N:19]([CH2:22][CH2:23][N:24]3[CH2:27][CH2:26][CH2:25]3)[CH2:18][CH2:17]2)=[O:15])[CH:8]=1

Participants

6

Reactant 2

HCID 12259960Phenylacetyl isocyanateHCID 576777584-[2-(Azetidin-1-yl)ethyl]piperazine-1-carboxylic acid [4-(4-amino-2fluorophenoxy)pyridin-2-yl]amide

Product 1

HCID 576774424-[2-(Azetidin-1-yl)ethyl]piperazine-1-carboxylic acid {4-[2-fluoro-4-(3-phenylacetylureido)phenoxy]pyridin-2-yl}amideYield 64%

Reagents, catalysts & solvents 3

HCID 3283Diethyl EtherSolventHCID 6228DimethylformamideSolventHCID 8058HexaneSolvent2×

Procedure

To a solution of 4-[2-(azetidin-1-yl)ethyl]piperazine-1-carboxylic acid [4-(4-amino-2-fluorophenoxy)pyridin-2-yl]amide (71 mg) in N,N-dimethylformamide (2 ml) was added a solution of 0.25 M 2-phenylacetyl isocyanate in hexane (2.05 ml) under a nitrogen atmosphere, followed by stirring for 1 hr. The reaction mixture was partitioned between ethyl acetate (100 ml) and a saturated aqueous solution of sodium hydrogencarbonate (50 ml). The organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate (50 ml), water (50 ml), brine (50 ml) and dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, which was then purified by silica gel column chromatography (Fuji Silysia NH, eluent; ethyl acetate, then ethyl acetate:methanol=9:1). Fractions containing the target compound were concentrated to give a residue, which was then suspended in diethyl ether (1.5 ml) and hexane (3 ml). The solid was filtered off and dried under aeration to provide the titled compound (63.0 mg, 64.0%) as white powder.

Workup

  1. customThe reaction mixture was partitioned between ethyl acetate (100 ml)
  2. washThe organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate (50 ml), water (50 ml), brine (50 ml)
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe solvent was evaporated
  5. customto give a residue, which
  6. customwas then purified by silica gel column chromatography (Fuji Silysia NH, eluent
  7. additionFractions containing the target compound
  8. concentrationwere concentrated
  9. customto give a residue, which
  10. filtrationThe solid was filtered off
  11. customdried under aeration

Sources & evidence

ORD record
ord-20fdd9d1734b459badc196021a92d26c
Source dataset
uspto-grants-2009_05
Patent number
US07531532B2

Reaction notes

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