Diisobutylaluminum hydride → N-(3,4-Difluorobenzyl)-2-formyl-6-methoxy-1-(pyridin-2-ylmethyl)-1H-indole-3-carboxamide

HRID 40101Notes

Reaction equation

C[O:2][C:3]([C:5]1[N:6]([CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][N:30]=2)[C:7]2[C:12]([C:13]=1[C:14](=[O:25])[NH:15][CH2:16][C:17]1[CH:22]=[CH:21][C:20]([F:23])=[C:19]([F:24])[CH:18]=1)=[CH:11][CH:10]=[C:9]([O:26][CH3:27])[CH:8]=2)=O.CC(C[AlH]CC(C)C)C>C(Cl)Cl>[F:24][C:19]1[CH:18]=[C:17]([CH:22]=[CH:21][C:20]=1[F:23])[CH2:16][NH:15][C:14]([C:13]1[C:12]2[C:7](=[CH:8][C:9]([O:26][CH3:27])=[CH:10][CH:11]=2)[N:6]([CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][N:30]=2)[C:5]=1[CH:3]=[O:2])=[O:25]

Participants

Conditions

Temperature: -78 °C

Procedure

General Procedure O. To a solution of methyl3-(3,4-difluorobenzylcarbamoyl)-6-methoxy-1-(pyridin-2-ylmethyl)-1H-indole-2-carboxylate (Compound 93, 515 mg, 1.11 mmol) in CH2Cl2 (20 ml) at −78° C. was added DIBAL (1 M in CH2Cl2, 4.4 ml, 4.44 mmol) slowly. The reaction was stirred at −78° C. for 2 h, quenched with H2O, diluted with EtOAc, washed with NaOH and brine, dried over Na2SO4, and concentrated in vacuo. The residue was purified by chromatography on silica gel (0→100% EtOAc-hexanes) to yield the title compound as a beige solid.

Workup

customquenched with H2O
additiondiluted with EtOAc
washwashed with NaOH and brine
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo
customThe residue was purified by chromatography on silica gel (0→100% EtOAc-hexanes)

Sources & evidence

ORD record: ord-b4c260ab9f1e40ebb0dfe4ed0f877ec7
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08524917B2

Reaction notes

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