Acetic Acid → 3-(1H-Pyrrolo[2,3-b]pyridin-4-ylamino)-thiophene-2-carboxylic acid [2-(4-methoxy-benzylamino)-ethyl]-amide

HRID 570426Notes

Reaction equation

[NH2:1][CH2:2][CH2:3][NH:4][C:5]([C:7]1[S:8][CH:9]=[CH:10][C:11]=1[NH:12][C:13]1[CH:18]=[CH:17][N:16]=[C:15]2[NH:19][CH:20]=[CH:21][C:14]=12)=[O:6].[CH3:22][O:23][C:24]1[CH:31]=[CH:30][C:27]([CH:28]=O)=[CH:26][CH:25]=1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>CO>[CH3:22][O:23][C:24]1[CH:31]=[CH:30][C:27]([CH2:28][NH:1][CH2:2][CH2:3][NH:4][C:5]([C:7]2[S:8][CH:9]=[CH:10][C:11]=2[NH:12][C:13]2[CH:18]=[CH:17][N:16]=[C:15]3[NH:19][CH:20]=[CH:21][C:14]=23)=[O:6])=[CH:26][CH:25]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of 3-(1H-Pyrrolo[2,3-b]pyridin-4-ylamino)-thiophene-2-carboxylic acid (2-amino-ethyl)-amide (45 mg, 0.13 mmol), 4-methoxy benzaldehyde (16 uL, 0.13 mmol), and glacial acetic acid (8 uL, 0.13 mmol) in methanol (1 mL) was added sodium triacetoxy borohydride (84 mg, 0.4 mmol) portionwise. The solution was stirred at 50° C. for 18 h. The solution was absorbed onto Celite and purified by ISCO Companion (silica 0-10% methanol, methylene chloride, 1% ammonium hydroxide) to afford 3-(1H-Pyrrolo[2,3-b]pyridin-4-ylamino)-thiophene-2-carboxylic acid [2-(4-methoxy-benzylamino)-ethyl]-amide (56 mg, 75%) LCMS (ESI) 422 (M+H) 1H NMR (400 MHz, DMSO-d6) δ ppm 10.26 (1H, br. s.) 7.98-8.07 (2H, m) 7.77 (1H, d, J=5.47 Hz) 7.46 (1H, d, J=5.47 Hz) 7.30 (1H, d, J=3.32 Hz) 7.19 (2H, d, J=8.59 Hz) 6.76-6.84 (2H, m) 6.43 (1H, d, J=3.51 Hz) 3.69 (3H, s) 3.60 (2H, s) 3.33 (2H, q, J=6.25 Hz) 2.61 (2H, t, J=6.64 Hz)

Workup

customThe solution was absorbed onto Celite
custompurified by ISCO Companion (silica 0-10% methanol, methylene chloride, 1% ammonium hydroxide)

Sources & evidence

ORD record: ord-0ae7e312c50f451da9789062bac4347b
Source dataset: uspto-grants-2015_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09023847B2

Reaction notes

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