p-(Trifluoromethoxy)phenyl isocyanate → HCID 49780163, compound

HRID 929504Notes

Reaction equation

HRID 929504 reaction equation
[F:1][C:2]([F:14])([F:13])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]=[C:11]=[O:12])=[CH:6][CH:5]=1.[C:15]([N:22]1[CH2:27][CH2:26][CH:25]([NH2:28])[CH2:24][CH2:23]1)([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16]>C1COCC1>[F:1][C:2]([F:13])([F:14])[O:3][C:4]1[CH:5]=[CH:6][C:7]([NH:10][C:11](=[O:12])[NH:28][CH:25]2[CH2:24][CH2:23][N:22]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:27][CH2:26]2)=[CH:8][CH:9]=1

Participants

4

Reactant 2

HCID 92298p-(Trifluoromethoxy)phenyl isocyanateHCID 12682914-Amino-1-Boc-piperidine

Product 1

HCID 49780163HCID 49780163, compoundYield 95%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

4-Trifluoromethoxyphenyl isocyanate (1.03 g, 5 mmol) was dissolved in dry THF (10 mL) and cooled in an ice bath. A solution of N—BOC-4-aminopiperidine (781 mg, 5 mmol) in dry THF (10 mL) was slowly added. The reaction was allowed to warm to RT and stir for 12 hours. The solvent was removed and the residue chromatographed from ethyl acetate to give intermediate 41 (1.71 g, 95%) as a white solid: Mp 160-162° C. 1H NMR (500 MHz, DMSO-d6) δ 8.54 (s, 1H), 7.47 (d, J=9.0 Hz, 2H), 7.21 (d, J=8.6 Hz, 2H), 6.22 (d, J=7.6 Hz, 1H), 3.81 (d, J=13.0 Hz, 2H), 3.67-3.59 (m, 1H), 2.90 (s, 2H), 1.79 (dd, J=12.6, 2.5 Hz, 2H), 1.40 (s, 9H), 1.25 (dq, J=12.1, 3.9 Hz, 2H). HRMS calculated for C18H24F3N3O4−H+402.1641. found (ESI(−), [M−H]) 402.1612.

Workup

  1. temperaturecooled in an ice bath
  2. customThe solvent was removed
  3. customthe residue chromatographed from ethyl acetate

Sources & evidence

ORD record
ord-62d4a2c0b0604116bcccef6b7b572e44
Source dataset
uspto-grants-2016_03
Patent number
US09296693B2

Reaction notes

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