Aluminium lithium hydride → [7-(dibenzylamino)-1H-pyrrolo[2,3-c]pyridin-2-yl]methanol

HRID 1821915Notes

Reaction equation

[CH2:1]([N:8]([CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[C:9]1[N:10]=[CH:11][CH:12]=[C:13]2[CH:17]=[C:16]([C:18](OCC)=[O:19])[NH:15][C:14]=12)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O1CCCC1>[CH2:23]([N:8]([CH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1)[C:9]1[N:10]=[CH:11][CH:12]=[C:13]2[CH:17]=[C:16]([CH2:18][OH:19])[NH:15][C:14]=12)[C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1

Participants

Conditions

Temperature: 0 °C

Procedure

Ethyl 7-(dibenzylamino)-1H-pyrrolo[2,3-c]pyridine-2-carboxylate (Reference Example 3) (11.2 g, 29.0 mmol) was dissolved in tetrahydrofuran (150 mL) while stirring under N2 at 0° C. Lithium aluminum hydride (1.65 g, 43.4 mmol) was added in three portions, while monitoring the gas evolution and temperature. After the final addition, the reaction mixture was stirred at room temperature for 3 h and then heated at 60° C. for 3 h. The reaction mixture was cooled to 0° C. and quenched with freshly prepared hydrated sodium sulfate. The solid was removed by filtration and washed thoroughly with tetrahydrofuran. Concentration of the filtrate provided [7-(dibenzylamino)-1H-pyrrolo[2,3-c]pyridin-2-yl]methanol (9.8 g, 99%) as a yellow solid: 1H NMR (300 MHz, CDCl3) δ4.63 (2H, s), 4.78 (4H, s), 6.26 (1H, s), 6.98 (1H, d, J=5.54 Hz), 7.27-7.38 (10H, m), 7.84 (1H, d, J=5.7 Hz), 8.27 (1H, br s).

Workup

additionAfter the final addition
stirringthe reaction mixture was stirred at room temperature for 3 h
temperatureheated at 60° C. for 3 h
temperatureThe reaction mixture was cooled to 0° C.
customquenched with freshly prepared hydrated sodium sulfate
customThe solid was removed by filtration
washwashed thoroughly with tetrahydrofuran

Sources & evidence

ORD record: ord-437ab0b97c3f44e39aba2ad8d09e0fd2
Source dataset: uspto-grants-2009_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07608627B2

Reaction notes

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