5-amino-8-chloro-7-(1,4-dimethyl-1H-1,2,3-triazol-5-yl)-6-iodo-3,4-dihydroisoquinolin-1(2H)-one → 5-amino-8-chloro-7-(1,4-dimethyl-1H-1,2,3-triazol-5-yl)-3,4-dihydroisoquinolin-1(2H)-one
Reaction equation
[NH2:1][C:2]1[C:11](I)=[C:10]([C:13]2[N:17]([CH3:18])[N:16]=[N:15][C:14]=2[CH3:19])[C:9]([Cl:20])=[C:8]2[C:3]=1[CH2:4][CH2:5][NH:6][C:7]2=[O:21]>[Pd].C(O)(=O)C.CO>[NH2:1][C:2]1[CH:11]=[C:10]([C:13]2[N:17]([CH3:18])[N:16]=[N:15][C:14]=2[CH3:19])[C:9]([Cl:20])=[C:8]2[C:3]=1[CH2:4][CH2:5][NH:6][C:7]2=[O:21]Participants
Reactant 1
Product 1
Reagents, catalysts & solvents 3
Procedure
Two batches were prepared by the following method: a mixture of 5-amino-8-chloro-7-(1,4-dimethyl-1H-1,2,3-triazol-5-yl)-6-iodo-3,4-dihydroisoquinolin-1(2H)-one (293f, 2.9 g, 6.9 mmol each batch) and palladium on carbon (2.9 g) in glacial acetic acid (29 mL) and methanol (290 mL) was stirred under a hydrogen balloon at room temperature overnight. The combined reaction mixtures were filtered through celite, and the filter pad washed with methanol (300 mL). The filtrate was concentrated and the residue purified by silica gel chromatography (eluting with 10:1 dichloromethane/methanol) affording 5-amino-8-chloro-7-(1,4-dimethyl-1H-1,2,3-triazol-5-yl)-3,4-dihydroisoquinolin-1(2H)-one (293g, 3.6 g, 65% combined yield) as yellow solid. 1H NMR (400 MHz, DMSO-d6): δ 8.12 (s, 1H), 6.82 (s, 1H), 3.75 (s, 3H), 3.29-3.28 (m, 2H), 2.70-2.67 (m, 2H), 2.07 (s, 3H). MS: 292 [M+1].
Workup
- customTwo batches were prepared by the following method
- customThe combined reaction mixtures
- filtrationwere filtered through celite
- washthe filter pad washed with methanol (300 mL)
- concentrationThe filtrate was concentrated
- customthe residue purified by silica gel chromatography (eluting with 10:1 dichloromethane/methanol)
Sources & evidence
- ORD record
- ord-52348bbc034c448696541b48f736140b
- Source dataset
- uspto-grants-2015_05
- Patent number
- US09040515B2
Reaction notes
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