Cyclohexyl isocyanate → HCID 24895846, compound

HRID 240674Notes

Reaction equation

HRID 240674 reaction equation
Cl.[CH3:2][NH:3][CH2:4][C:5]1[CH:13]=[CH:12][CH:11]=[C:10]2[C:6]=1[CH2:7][N:8]([CH:15]1[CH2:20][CH2:19][C:18](=[O:21])[NH:17][C:16]1=[O:22])[C:9]2=[O:14].[CH:23]1([N:29]=[C:30]=[O:31])[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24]1.C(N(C(C)C)CC)(C)C>C(Cl)Cl>[CH:23]1([NH:29][C:30](=[O:31])[N:3]([CH2:4][C:5]2[CH:13]=[CH:12][CH:11]=[C:10]3[C:6]=2[CH2:7][N:8]([CH:15]2[CH2:20][CH2:19][C:18](=[O:21])[NH:17][C:16]2=[O:22])[C:9]3=[O:14])[CH3:2])[CH2:28][CH2:27][CH2:26][CH2:25][CH2:24]1

Participants

5

Reactant 3

HCID 18502Cyclohexyl isocyanateHCID 81531DiisopropylethylamineHCID 67026973HCID 67026973, compound

Product 1

HCID 24895846HCID 24895846, compoundYield 71%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of 3-(4-methylaminomethyl-1-oxo-1,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione hydrochloride (0.60 g, 1.86 mmol) and cyclohexyl isocyanate (0.28 mL, 2.23 mmol) in dry CH2Cl2 (80 ml), was added diisopropylethylamine (0.45 mL g, 2.60 mmol). The mixture was stirred at room temperature overnight. The mixture was quenched with MeOH and extracted with H2O (40 mL), then with 1N HCl (40 mL). The organic layer was washed with brine (40 mL) and concentrated on rota-vap. The resulting oil was purified on silica gel column to give 3-cyclohexyl-1-[2-(2,6-dioxo-piperidin-3-yl) 1-oxo-2,3-dihydro-1H-isoindol-4-ylmethyl]-1-methyl-urea (0.54 g, 71%): mp 219-221° C.; HPLC: Waters Symmetry C-18, 3.9×150 mm, 5 micro, 1 mL/min, 240 nm, 30/70 (CH3CN/H2O): tR=4.61 (99%); 1H NMR (DMSO-d6): δ 1.02-1.30 (m, 5H), 1.54-1.76 (m, 5H), 2.00-2.05 (m, 1H), 2.29-2.36 (m, 1H), 2.58-2.64 (m, 1H), 2.76 (s, 3H), 2.87-3.01 (m, 1H), 3.36-3.42 (m, 1H), 4.28 (d, J=17.3 Hz, 1H), 4.36 (d, J=17.5 Hz, 1H), 4.53 (s, 2H), 5.12-5.19 (dd, J=4.9, 13.1 Hz, 1H), 6.07 (d, J=7.7 Hz, 1H), 7.38 (d, J=7.4 Hz, 1H), 7.50 (t, J=7.4 Hz, 1H), 7.61 (d, J=7.4 Hz, 1H), 11.03 (s, 1H). 13C NMR (DMSO-d6) δ: 22.69, 25.10, 25.35, 31.14, 33.22, 34.00, 46.12, 48.21, 49.34, 51.45, 121.59, 128.30, 130.08, 131.87, 134.41, 139.99, 157.09, 168.02, 170.99, 172.84. Anal Calcd for C22H28N4O4+0.1H2O: C, 63.78; H, 6.86; N, 13.52. Found: C, 63.41; H, 6.93; N, 13.33.

Workup

  1. customThe mixture was quenched with MeOH
  2. extractionextracted with H2O (40 mL)
  3. washThe organic layer was washed with brine (40 mL)
  4. concentrationconcentrated on rota-vap
  5. customThe resulting oil was purified on silica gel column

Sources & evidence

ORD record
ord-bac592ed2c88449990cc77770c24b243
Source dataset
uspto-grants-2014_02
Patent number
US08648096B2

Reaction notes

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