Ethyl Acetate → 9-(2-Bromoacetyl)-3,4,7,8-tetrahydro-[1,4]diazepino[7,1-a]isoquinoline-2,5-dione

HRID 926315Notes

Reaction equation

C([O:3][C:4]([C:6]1[CH:15]=[CH:14][CH:13]=[C:12]2[C:7]=1[CH2:8][CH2:9][N:10]1[C:20](=[O:21])[CH2:19][NH:18][C:17](=[O:22])[CH:16]=[C:11]12)=[CH2:5])C.C1C(=O)N([Br:30])C(=O)C1.CCOC(C)=O>C1COCC1.O.[Cl-].[Na+].O>[Br:30][CH2:3][C:4]([C:6]1[CH:15]=[CH:14][CH:13]=[C:12]2[C:7]=1[CH2:8][CH2:9][N:10]1[C:20](=[O:21])[CH2:19][NH:18][C:17](=[O:22])[CH:16]=[C:11]12)=[O:5]

Participants

Conditions

Temperature: 0 °C

Procedure

111-2. A solution of 9-(1-ethoxyvinyl)-3,4,7,8-tetrahydro -[1,4]diazepino[7,1-a]isoquinoline-2,5-dione (1.2 g, 4.02 mmol) in a mixture of THF/H2O (3:1, 40 mL) was treated with NBS (716 mg, 4.02 mmol) and the mixture was stirred at 0° C. for 10 min. The mixture was partioned between AcOEt and brine and the org. phase was separated, dried over Na2SO4, filtered and concentrated in vacuo to give the title compound (880 mg) that was used as it is in the next step. UPLC-MS: MS 349.0 (M+H+); UPLC rt 0.69 min.

Workup

customphase was separated
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-7c0cca5adc6f4c21b17a4e11f53e9e23
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09284331B2

Reaction notes

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