Isoquinoline-3-carboxylic acid → HCID 66940229, compound

HRID 1844960Notes

Reaction equation

HRID 1844960 reaction equation
[CH3:1][O:2][C:3]([C:5]1[C:13]2[N:12]=[C:11]([NH2:14])[NH:10][C:9]=2[CH:8]=[C:7]([N+:15]([O-:17])=[O:16])[CH:6]=1)=[O:4].[CH:18]1[C:27]2[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=2)[CH:21]=[C:20]([C:28](O)=[O:29])[N:19]=1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>>[CH3:1][O:2][C:3]([C:5]1[C:13]2[N:12]=[C:11]([NH:14][C:28]([C:20]3[N:19]=[CH:18][C:27]4[C:22]([CH:21]=3)=[CH:23][CH:24]=[CH:25][CH:26]=4)=[O:29])[NH:10][C:9]=2[CH:8]=[C:7]([N+:15]([O-:17])=[O:16])[CH:6]=1)=[O:4]

Participants

4

Reactant 3

HCID 124656Isoquinoline-3-carboxylic acidHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 58190839HCID 58190839, compound

Product 1

HCID 66940229HCID 66940229, compoundYield 80.8%

Procedure

0.5 g (2.12 mmol) of 2-amino-6-nitro-1H-benzoimidazole-4-carboxylic acid methyl ester was reacted with 0.37 g (2.12 mmol) of isoquinoline 3-carboxylic acid and 0.89 g (2.33 mmol) of HBTU as described in general procedure A to provide 0.67 g (80%) of 2-[(Isoquinoline-3-carbonyl)-amino]-6-nitro-1H-benzoimidazole-4-carboxylic acid methyl ester. LCMS: 392 (M+1)+. The ester was dissolved in dry DMF (5 mL) and 0.22 g (5.1 mmol) of LiCl in one portion was added. The resulting mixture was stirred at 120° C. for 12 h, diluted with water, and the solid was collected by filtration. The solid was washed with water (20 mL), ether (10 mL) and dried under vacuum to provide 0.6 g (93%) of 2-[(isoquinoline-3-carbonyl)-amino]-6-nitro-1H-benzoimidazole-4-carboxylic acid. LCMS: 378 (M+1)+.

Sources & evidence

ORD record
ord-b18639ffb0664bbcbb1251179cb95b73
Source dataset
uspto-grants-2015_02
Patent number
US08946259B2

Reaction notes

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