4-Chlorophenyl Isocyanate → 1-(4-Chloro-phenyl)-3-[3-(2,6-dioxo-piperidin-3-yl)-2-methyl-4-oxo-3,4-dihydro-quinazolin-6-ylmethyl]-urea

HRID 509487Notes

Reaction equation

HRID 509487 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:5]=[C:6]2[C:11](=[CH:12][CH:13]=1)[N:10]=[C:9]([CH3:14])[N:8]([CH:15]1[CH2:20][CH2:19][C:18](=[O:21])[NH:17][C:16]1=[O:22])[C:7]2=[O:23].C(N(CC)CC)C.[Cl:31][C:32]1[CH:37]=[CH:36][C:35]([N:38]=[C:39]=[O:40])=[CH:34][CH:33]=1>C1COCC1>[Cl:31][C:32]1[CH:37]=[CH:36][C:35]([NH:38][C:39]([NH:2][CH2:3][C:4]2[CH:5]=[C:6]3[C:11](=[CH:12][CH:13]=2)[N:10]=[C:9]([CH3:14])[N:8]([CH:15]2[CH2:20][CH2:19][C:18](=[O:21])[NH:17][C:16]2=[O:22])[C:7]3=[O:23])=[O:40])=[CH:34][CH:33]=1

Participants

5

Reactant 3

HCID 76934-Chlorophenyl IsocyanateHCID 8471TriethylamineHCID 687303673-(6-(aminomethyl)-2-methyl-4-oxoquinazolin-3(4H)-yl)piperidine-2,6-dione hydrochloride

Product 1

HCID 252357341-(4-Chloro-phenyl)-3-[3-(2,6-dioxo-piperidin-3-yl)-2-methyl-4-oxo-3,4-dihydro-quinazolin-6-ylmethyl]-ureaYield 63%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a stirred suspension of 3-(6-aminomethyl-2-methyl-4-oxo-4H-quinazolin-3-yl)-piperidine-2,6-dione hydrogen chloride (0.47 g, 1.4 mmol) and triethylamine (0.27 mL, 2.0 mmol) in THF (8 mL) at 5˜10° C., was added 4-chlorophenyl isocyanate (0.28 g, 1.8 mmol), and the mixture was stirred at room temperature overnight. The mixture was quenched with methanol (−1 mL), and the solvent was evaporated. The residue was purified by flash column chromatography (Silica gel, methanol/methylene chloride 4%/96%) to give 1-(4-chloro-phenyl)-3-[3-(2,6-dioxo-piperidin-3-yl)-2-methyl-4-oxo-3,4-dihydro-quinazolin-6-ylmethyl]-urea as an off-white solid (400 mg, 63% yield); HPLC, Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 10/90 CH3CN/0.1% H3PO4, grad. to 95/5 in 5 min. kept 5 min, 6.18 min (98.9%); mp, 225-227° C.; 1HNMR (DMSO-d6) δ 2.15-2.20 (m, 1H, CHH), 2.56-2.91 (m, 6H, CHCH2, CH), 4.41 (d, J=5 Hz, 2H, CH2NH), 5.26 (dd, J=6, 11 Hz, 1H, CH), 6.81 (t, J=6 Hz, 1H, CH2NH), 7.23-7.95 (m, 7H, Ar), 8.80 (s, 1H, NH), 11.02 (s, 1H, NH); 13C NMR (DMSO-d6) δ 20.93, 23.38, 30.61, 42.33, 56.54, 119.23, 120.01, 123.67, 124.57, 126.53, 128.42, 133.95, 139.05, 139.37, 145.74, 154.53, 155.09, 160.46, 169.47, 172.60. LCMS MH=454, 456; Anal Calcd For C22H20N5O4Cl+0.8H2O: C, 56.43; H, 4.65; N, 14.95; Cl, 7.57. Found: C, 56.45; H, 4.56; N, 14.87; Cl, 7.69.

Workup

  1. customThe mixture was quenched with methanol (−1 mL)
  2. customthe solvent was evaporated
  3. customThe residue was purified by flash column chromatography (Silica gel, methanol/methylene chloride 4%/96%)

Sources & evidence

ORD record
ord-ddf5390d006f4d18b706f588db34d7d7
Source dataset
uspto-grants-2015_08
Patent number
US09096573B2

Reaction notes

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