Sodium Bicarbonate → (rac)-7-(4-Cyanophenyl)-5-methyl-2-thiophen-2-yl-4,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidine-6-carbonitrile

HRID 2200924Notes

Reaction equation

[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[C:6]1[N:10]=[C:9]([NH2:11])[NH:8][N:7]=1.[C:12]([C:14]([C:24](=O)[CH3:25])=[CH:15][C:16]1[CH:23]=[CH:22][C:19]([C:20]#[N:21])=[CH:18][CH:17]=1)#[N:13].C(=O)(O)[O-].[Na+]>CN(C=O)C>[C:20]([C:19]1[CH:22]=[CH:23][C:16]([CH:15]2[N:8]3[N:7]=[C:6]([C:2]4[S:1][CH:5]=[CH:4][CH:3]=4)[N:10]=[C:9]3[NH:11][C:24]([CH3:25])=[C:14]2[C:12]#[N:13])=[CH:17][CH:18]=1)#[N:21]

Participants

Conditions

Temperature: 55 °C

Procedure

Under an atmosphere of argon, 3-(2-thienyl)-1H-1,2,4-triazole-5-amine (318 mg, 1.9 mmol) and 4-(2-cyano-3-oxobut-1-en-1-yl)benzonitrile (300 mg, 1.5 mmol, 0.8 eq.) were dissolved in DMF (3 ml), and solid sodium bicarbonate (803 mg, 9.6 mmol, 5 eq.) was added. The mixture was stirred at 55° C. for 12 h. The mixture was then filtered, and the DMF from the filtrate was distilled off under reduced pressure. The residue was purified by preparative HPLC (Kromasil C18 column, 30×250 mm; mobile phase: acetonitrile-water-0.1% TFA). The product was obtained as a solid (73.7 mg, 91% pure, 12% of theory).

Workup

filtrationThe mixture was then filtered
distillationthe DMF from the filtrate was distilled off under reduced pressure
customThe residue was purified by preparative HPLC (Kromasil C18 column, 30×250 mm; mobile phase: acetonitrile-water-0.1% TFA)
customThe product was obtained as a solid (73.7 mg, 91% pure, 12% of theory)

Sources & evidence

ORD record: ord-e99aa215b0df4f369b5e02997bff9bc5
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09359362B2

Reaction notes

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