Phenyl isocyanate → tert-butyl 6-{2-[(anilinocarbonyl)amino]ethyl}-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate

HRID 2306962Notes

Reaction equation

HRID 2306962 reaction equation
[NH2:1][CH2:2][CH2:3][N:4]1[C:12]2[CH:11]=[CH:10][CH:9]=[CH:8][C:7]=2[C:6]2[CH2:13][CH2:14][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:16][CH2:17][C:5]1=2.[C:25]1([N:31]=[C:32]=[O:33])[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>C1COCC1>[NH:31]([C:32]([NH:1][CH2:2][CH2:3][N:4]1[C:12]2[CH:11]=[CH:10][CH:9]=[CH:8][C:7]=2[C:6]2[CH2:13][CH2:14][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:16][CH2:17][C:5]1=2)=[O:33])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1

Participants

4

Reactant 2

HCID 7672Phenyl isocyanateHCID 22396663tert-butyl 6-(2-aminoethyl)-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate

Product 1

HCID 22396805tert-butyl 6-{2-[(anilinocarbonyl)amino]ethyl}-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylateYield 72%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

tert-Butyl 6-(2-aminoethyl)-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (0.0399 g, 0.121 mmol) was dissolved in THF (2 mL) at rt under N2. Phenyl isocyanate (0.016 g mL, 0.0173 g, 0.145 mmol, 1.20equiv.) was added, then the reaction mixture was stirred for 2.5 h. The reaction mixture was concentrated and the crude product (0.0598 g) was chromatographed (SiO2 25 g, eluted with 3:2 hexane:EtOAc) to give tert-butyl 6-{2-[(anilinocarbonyl)amino]ethyl}-1,4,5,6-tetrahydroazepino[4,5-b]indole-3(2H)-carboxylate (0.0390 g) in 72% yield. 1H NMR (300 MHz, CDCl3) δ 1.36, 1.44, 2.96-3.08, 3.42-3.51, 3.65-3.72, 4.17, 4.23, 5.14, 5.23, 6.94-7.30, 7.43-7.49; MS (ESI+) for C26H32N4O3 m/z 449.1 (M+H)+.

Workup

  1. concentrationThe reaction mixture was concentrated
  2. customthe crude product (0.0598 g) was chromatographed
  3. wash(SiO2 25 g, eluted with 3:2 hexane:EtOAc)

Sources & evidence

ORD record
ord-a277193ef80a47119015a130af376f6d
Source dataset
uspto-grants-2004_12
Patent number
US06828314B2

Reaction notes

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