Benzyl Bromide → 3-benzyl-6-bromoquinazolin-4(3H)-one

HRID 535700Notes

Reaction equation

[CH2:1](Br)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Br:9][C:10]1[CH:11]=[C:12]2[C:17](=[CH:18][CH:19]=1)[N:16]=[CH:15][NH:14][C:13]2=[O:20].[H-].[Na+]>CN(C=O)C>[CH2:1]([N:14]1[C:13](=[O:20])[C:12]2[C:17](=[CH:18][CH:19]=[C:10]([Br:9])[CH:11]=2)[N:16]=[CH:15]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

Benzyl bromide (0.264 mL, 2.22 mmol) was added to a solution of 6-bromoquinazolin-4(3H)-one (0.5 g, 2.22 mmol) and NaH (0.08 g, 3.33 mmol) in DMF (5 mL) at 0° C. The reaction mixture was heated to 80° C. for 4 h. The reaction mixture was partitioned between ethyl acetate and water. Organic layer was separated, washed with brine, dried over sodium sulphate, filtered and concentrated in vacuo to afford title compound (0.4 g, 48.1%) as pale yellow solid. 1H NMR (400 MHz, CDCl3): δ 8.46 (d, J=1.6 Hz, 1H), 8.09 (s, 1H), 7.83 (dd, J1=2.0 Hz, J2=8.8 Hz, 1H), 7.57 (d, J=8.4 Hz, 1H), 7.4-7.2 (m, 5H), 5.2 (s, 2H); ESI-MS m/z=315 (M+H)+; LCMS purity: 84.2%

Workup

customThe reaction mixture was partitioned between ethyl acetate and water
customOrganic layer was separated
washwashed with brine
dry with materialdried over sodium sulphate
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-c76b483e73224ae8beff4fbf424b796d
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08859536B2

Reaction notes

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