C-(5-methylfuran-2-yl)-C-(3-methyloxetan-3-yl)methylamine → 3-[2-Hydroxy-3-(pyrrolidine-1-carbonyl)phenylamino]-4-{[(5-methylfuran-2-yl)-(3-methyloxetan-3-yl)methyl]amino}cyclobut-3-ene-1,2-dione

HRID 1528173Notes

Reaction equation

[CH3:1][C:2]1[O:6][C:5]([CH:7]([NH2:13])[C:8]2([CH3:12])[CH2:11][O:10][CH2:9]2)=[CH:4][CH:3]=1.C([O:16][C:17]1[C:18](=[O:37])[C:19](=O)[C:20]=1[NH:21][C:22]1[CH:27]=[CH:26][CH:25]=[C:24]([C:28]([N:30]2[CH2:34][CH2:33][CH2:32][CH2:31]2)=[O:29])[C:23]=1[OH:35])C>CO>[OH:35][C:23]1[C:24]([C:28]([N:30]2[CH2:34][CH2:33][CH2:32][CH2:31]2)=[O:29])=[CH:25][CH:26]=[CH:27][C:22]=1[NH:21][C:20]1[C:17](=[O:16])[C:18](=[O:37])[C:19]=1[NH:13][CH:7]([C:5]1[O:6][C:2]([CH3:1])=[CH:3][CH:4]=1)[C:8]1([CH3:12])[CH2:9][O:10][CH2:11]1

Participants

Conditions

Temperature: 50 °C

Procedure

385 mg (2.12 mmol) of C-(5-methylfuran-2-yl)-C-(3-methyloxetan-3-yl)methylamine in solution in 3 ml of methanol were added to a solution of 443 mg (1.40 mmol) of 3-ethoxy-4-[2-hydroxy-3-(pyrrolidine-1-carbonyl)phenylamino]cyclobut-3-ene-1,2-dione in 42 ml of methanol. The reaction medium was heated at 50° C. for 13 hours. The reaction medium was concentrated. The residue was taken up with ethyl acetate and was washed twice with a 1 M aqueous sodium dihydrogen phosphate solution. The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated. 0.62 g of product were obtained in the form of a beige solid. Yield=95%, HPLC=94.06%, Mp=210° C.

Workup

concentrationThe reaction medium was concentrated
washwas washed twice with a 1 M aqueous sodium dihydrogen phosphate solution
dry with materialThe organic phase was dried over anhydrous sodium sulfate
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-68a87a2bcd7a4b12af8e52c5f430661f
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09090596B2

Reaction notes

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