Ethanolamine → 8-anilino-N-(2-hydroxyethyl)-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxamide

HRID 44620Notes

Reaction equation

[NH:1]([C:8]1[N:17]=[CH:16][C:15]2[CH2:14][CH2:13][C:12]3[C:18]([C:22](OCC)=[O:23])=[N:19][N:20]([CH3:21])[C:11]=3[C:10]=2[N:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:27]([CH2:29][NH2:30])[OH:28]>CO.CN(C)C=O>[NH:1]([C:8]1[N:17]=[CH:16][C:15]2[CH2:14][CH2:13][C:12]3[C:18]([C:22]([NH:30][CH2:29][CH2:27][OH:28])=[O:23])=[N:19][N:20]([CH3:21])[C:11]=3[C:10]=2[N:9]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 65 °C

Procedure

To a suspension of 0.30 g (0.86 mmol) of ethyl 8-anilino-1-methyl-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxylate in a mixture of 10 mL of methanol and 10 mL of dimethylformamide, 5 mL of ethanolamine were added. The mixture was heated in a close bottle under stirring at 65° C. After 5 hours the solvent was removed, the residue redissolved with dichloromethane and washed with water. The organic layer was dried over Na2SO4 and evaporated. The residue was triturated with diethyl ether and the product collected by filtration (60% yield).

Workup

additionwere added
temperatureThe mixture was heated in a close bottle
customAfter 5 hours the solvent was removed
dissolutionthe residue redissolved with dichloromethane
washwashed with water
dry with materialThe organic layer was dried over Na2SO4
customevaporated
customThe residue was triturated with diethyl ether
filtrationthe product collected by filtration (60% yield)

Sources & evidence

ORD record: ord-54ba90e55c5c49c3964ccaf9a65d20ca
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08541429B2

Reaction notes

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