Isoquinoline-3-carboxylic acid → HCID 66940229, compound

HRID 1367851Notes

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

Reactant 3

HCID 124656Isoquinoline-3-carboxylic acid

HCID 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-bb01ce8f25d846b387adc8bdeb94e34b
Source dataset: uspto-grants-2011_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07893267B2

Reaction notes

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