Ammonia → 4-Amino-3-[2-methyl-5-(5-methyl-[1,3,4]oxadiazol-2-yl)-phenoxymethyl]-thieno[3,2-c]pyridine-7-carboxylic acid ethyl ester

HRID 2081073Notes

Reaction equation

[NH3:1].[CH2:2]([O:4][C:5]([C:7]1[C:8]2[S:16][CH:15]=[C:14]([CH2:17][O:18][C:19]3[CH:24]=[C:23]([C:25]4[O:26][C:27]([CH3:30])=[N:28][N:29]=4)[CH:22]=[CH:21][C:20]=3[CH3:31])[C:9]=2[C:10](Cl)=[N:11][CH:12]=1)=[O:6])[CH3:3]>CC(O)C>[CH2:2]([O:4][C:5]([C:7]1[C:8]2[S:16][CH:15]=[C:14]([CH2:17][O:18][C:19]3[CH:24]=[C:23]([C:25]4[O:26][C:27]([CH3:30])=[N:28][N:29]=4)[CH:22]=[CH:21][C:20]=3[CH3:31])[C:9]=2[C:10]([NH2:1])=[N:11][CH:12]=1)=[O:6])[CH3:3]

Participants

Conditions

Temperature: 140 °C

Procedure

Ammonia gas was bubbled into a solution of 4-chloro-3-[2-methyl-5-(5-methyl-[1,3,4]oxadiazol-2-yl)-phenoxy-methyl]-thieno[3,2-c]pyridine-7-carboxylic acid ethyl ester (0.12 g, 0.28 mmol) (from Example 12 supra) in 2-propanol (15 mL) for 20 minutes. The mixture was heated in a microwave reactor at 140° C. for 2 hours. The reaction mixture was concentrated. The residue was purified by flash chromatography eluting with 30% ethyl acetate in dichloromethane to give recovered staring material (25 mg) and 4-amino-3-[2-methyl-5-(5-methyl-[1,3,4]oxadiazol-2-yl)-phenoxymethyl]-thieno[3,2-c]pyridine-7-carboxylic acid ethyl ester as a white powder. (Yield 0.053 g, 44%). HRMS (ES+) m/z Calcd for C21H20N4O4S+H [(M+H)+]: 425.1278. Found: 425.1274.

Workup

concentrationThe reaction mixture was concentrated
customThe residue was purified by flash chromatography
washeluting with 30% ethyl acetate in dichloromethane
customto give
customrecovered

Sources & evidence

ORD record: ord-3e193f6c0e124be6af38fb971c44b90b
Source dataset: uspto-grants-2011_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07932390B2

Reaction notes

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