Phosphorus oxychloride → 2-Cyclopentyl-5-ethyl-7-isobutylimidazo[5,1-f][1,2,4]triazin-4(3H)-one

HRID 7580Notes

Reaction equation

[CH:1]1([C:6]2[NH:11][C:10](=[O:12])[C:9]([CH:13]([NH:16][C:17](=O)[CH2:18][CH:19]([CH3:21])[CH3:20])[CH2:14][CH3:15])=[N:8][N:7]=2)[CH2:5][CH2:4][CH2:3][CH2:2]1.P(Cl)(Cl)(Cl)=O>>[CH:1]1([C:6]2[NH:11][C:10](=[O:12])[C:9]3=[C:13]([CH2:14][CH3:15])[N:16]=[C:17]([CH2:18][CH:19]([CH3:21])[CH3:20])[N:8]3[N:7]=2)[CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

Reactant 2

HCID 24813Phosphorus oxychloride

HCID 135752534N-[1-(3-Cyclopentyl-5-oxo-4,5-dihydro-1,2,4-triazin-6-yl)propyl]-3-methylbutanamide

Product 1

HCID 1357525422-Cyclopentyl-5-ethyl-7-isobutylimidazo[5,1-f][1,2,4]triazin-4(3H)-one

Procedure

In analogy to the procedure for Example 1, 200 mg (0.65 mmol) crude N-[1-(3-cyclopentyl-5-oxo-4,5-dihydro-1,2,4-triazin-6-yl)propyl]-3-methylbutanamide, 165 mg (1.1 mmol) phosphoric trichloride are stirred at reflux for 4 hours, proportionate amounts of the solvents are used. The product is purified by chromatography (preparative HPLC).

Workup

temperatureat reflux for 4 hours
customThe product is purified by chromatography (preparative HPLC)

Sources & evidence

ORD record: ord-c5798c17b447441b9e4060d433aabf09
Source dataset: uspto-grants-2006_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07087605B2

Reaction notes

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