2-Bromopropanedial → 6-(5-Formyl-thiazol-2-ylamino)-nicotinic acid

HRID 1985762Notes

Reaction equation

[NH:1]([C:5]1[CH:13]=[CH:12][C:8]([C:9]([OH:11])=[O:10])=[CH:7][N:6]=1)[C:2]([NH2:4])=[S:3].Br[CH:15]([CH:18]=O)[CH:16]=[O:17].C([O-])(=O)C.[Na+]>C(O)(=O)C.O>[CH:16]([C:15]1[S:3][C:2]([NH:1][C:5]2[CH:13]=[CH:12][C:8]([C:9]([OH:11])=[O:10])=[CH:7][N:6]=2)=[N:4][CH:18]=1)=[O:17]

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of 6-thioureido-nicotinic acid (197 mg, 1 mmol), 2-bromomalonaldehyde (166 mg, 1.1 mmol) and sodium acetate (100 mg) in acetic acid (2 mL) was stirred at 100° C. for 20 min. The mixture was then cooled to RT, diluted with water and the precipitates were collected. The solid was washed with water, then methanol and dried in vacuo to afford 6-(5-formyl-thiazol-2-ylamino)-nicotinic acid, (240 mg, 96%). MS m/z 250 (M+H)+. 1H NMR (DMSO-d6) δ 12.7 (s, 1H), 9.12 (s, 1H), 8.92 (s, 1H), 8.38 (s, 1H), 8.24 (d, 1H, J=5.6 Hz), 7.21 (d, 1H, J=5.6 Hz). 13C NMR (DMSO-d6) δ 183.5, 166.0, 165.1, 153.3, 151.5, 148.8, 139.1, 131.2, 120.3, 110.0.

Workup

temperatureThe mixture was then cooled to RT
customthe precipitates were collected
washThe solid was washed with water
dry with materialmethanol and dried in vacuo

Sources & evidence

ORD record: ord-2c4b374d3f0f43d587f06df6c0e52c6a
Source dataset: uspto-grants-2009_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07547711B2

Reaction notes

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