Methanol → 2-[3-(Phenylsulfonyl)-1H-pyrrolo[2,3-b]pyridin-1-yl]ethylamine dihydrochloride

HRID 1791140Notes

Reaction equation

[C:1]1([S:7]([C:10]2[C:18]3[C:13](=[N:14][CH:15]=[CH:16][CH:17]=3)[N:12]([CH2:19][CH2:20][N:21]3C(=O)C4C(=CC=CC=4)C3=O)[CH:11]=2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.NN.CO.C(Cl)[Cl:37]>O1CCOCC1>[ClH:37].[ClH:37].[C:1]1([S:7]([C:10]2[C:18]3[C:13](=[N:14][CH:15]=[CH:16][CH:17]=3)[N:12]([CH2:19][CH2:20][NH2:21])[CH:11]=2)(=[O:9])=[O:8])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of 2-{2-[3-(phenylsulfonyl)-1H-pyrrolo[2,3-b]pyridin-1-yl]ethyl}-1H-isoindole-1,3(2H)-dione (4.54 g, 10.5 mmol) in dioxane is treated with anhydrous hydrazine (8.3 mL, 265 mmol), heated at 50° C. for 3 h, concentrated in vacuo, diluted with water and extracted with CH2Cl2. The combined extracts are dried over MgSO4 and concentrated in vacuo to give a clear gum residue. Chromatography (1:9 methanol:CH2Cl2) of the residue affords the free amine of the title compound as a clear gum. The free amine is dissolved in ethanol, acidified with 2N aqueous HCl and concentration in vacuo. Crystallization of the resultant residue from ethanol/ether affords the title compound as a white solid, 3.20 g, mp 195–197° C., characterized by mass spectral and HNMR analyses.

Workup

concentrationconcentrated in vacuo
additiondiluted with water
extractionextracted with CH2Cl2
dry with materialThe combined extracts are dried over MgSO4
concentrationconcentrated in vacuo
customto give a clear gum residue

Sources & evidence

ORD record: ord-da1f783574de4c4192cd16468930a79e
Source dataset: uspto-grants-2006_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07074792B2

Reaction notes

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