3,3-Dimethylbutanoyl chloride → HCID 24968653, compound

HRID 1409637Notes

Reaction equation

HRID 1409637 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:13]=[CH:12][CH:11]=[C:10]2[C:5]=1[C:6](=[O:23])[N:7]([CH:15]1[CH2:20][CH2:19][C:18](=[O:21])[NH:17][C:16]1=[O:22])[C:8]([CH3:14])=[N:9]2.[C:24]([CH2:28][C:29](Cl)=[O:30])([CH3:27])([CH3:26])[CH3:25].C(N(CC)C(C)C)(C)C>C(#N)C>[O:22]=[C:16]1[CH:15]([N:7]2[C:6](=[O:23])[C:5]3[C:10](=[CH:11][CH:12]=[CH:13][C:4]=3[CH2:3][NH:2][C:29](=[O:30])[CH2:28][C:24]([CH3:27])([CH3:26])[CH3:25])[N:9]=[C:8]2[CH3:14])[CH2:20][CH2:19][C:18](=[O:21])[NH:17]1

Participants

5

Reactant 3

HCID 815143,3-Dimethylbutanoyl chlorideHCID 81531DiisopropylethylamineHCID 249683051015474-47-1

Product 1

HCID 24968653HCID 24968653, compoundYield 22%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a stirred mixture of 3-(5-aminomethyl-2-methyl-4-oxo-4H-quinazolin-3-yl)-piperidine-2,6-dione hydrogen chloride (0.49 g, 1.5 mmol) in acetonitrile (10 mL), was added t-butylacetyl chloride (0.31 mL, 2.2 mmol) and N,N-diisopropyl ethylamine (0.60 mL, 3.7 mmol). The mixture was stirred at room temp for 15 minutes. The solvent was evaporated, and the residue was purified by flash column chromatography (Silica gel, methanol/methylene chloride 4%/96%) to give N-[3-(2,6-dioxo-piperidin-3-yl)-2-methyl-4-oxo-3,4-dihydro-quinazolin-5-ylmethyl]-3,3-dimethyl-butyramide as a light yellow solid (120 mg, 22% yield); HPLC, Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 10/90 CH3CN/0.1% H3PO4, gradient to 95/5 in 5 min, kept for 5 min, 5.74 min (98.4%); mp, 212-214° C.; 1HNMR (DMSO-d6)0.96 (s, 9H, 3CH3), 2.08 (s, 2H, CH2Me3), 2.12-2.19 (m, 1H, CHH), 2.57-2.86 (m, 6H, CHCH2, CH3), 4.68-4.85 (m, 2H, CH2NH), 5.24 (dd, J=6, 11 Hz, 1H, CH), 7.34-7.76 (m, 3H, Ar), 8.11 (t, J=6 Hz, 1H, CH2NH), 11.02 (s, 1H, NH); 13C NMR (DMSO-d6) δ 20.76, 23.28, 29.69, 30.47, 30.58, 41.43, 48.76, 56.47, 117.65, 124.64, 125.42, 133.77, 141.19, 148.42, 154.75, 160.93, 169.51, 170.97, 172.60. LCMS MH=399; Anal Calcd For C21H26N4O4+0.1H2O: C, 63.02; H, 6.60; N, 14.00. Found: C, 62.86; H, 6.70; N, 13.92.

Workup

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

Sources & evidence

ORD record
ord-5c112e76e06d427a857246d822d7cf68
Source dataset
uspto-grants-2014_12
Patent number
US08921385B2

Reaction notes

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