Aluminium lithium hydride → (5-((6-Methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)methanol

HRID 632653Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:13]=[CH:14][C:15]([C:18](OC)=[O:19])=[N:16][CH:17]=3)=[C:9]([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=3)[S:8](=O)[C:7]=2[CH:31]=1.[H-].[H-].[H-].[H-].[Li+].[Al+3]>C1COCC1>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:13]=[CH:14][C:15]([CH2:18][OH:19])=[N:16][CH:17]=3)=[C:9]([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=3)[S:8][C:7]=2[CH:31]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of methyl 5-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)picolinate (0.314 g, 0.718 mmol) in THF (5.98 mL) at 0° C. was added LAH (1.0 M in THF, 2.153 mL, 2.15 mmol) dropwise and the reaction was stirred at 0° C. for 1 h. Upon completion the reaction was quenched with water and sat. aq. potassium sodium tartrate and the resulting mixture was stirred for 30 min and then extracted with EtOAc (3×). The organic layers were combined, passed through a phase separator and concentrated in vacuo to afford crude (5-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)pyridin-2-yl)methanol which was used without further purification. LC/MS (m/z, MH+): 394.2.

Workup

customUpon completion the reaction was quenched with water and sat. aq. potassium sodium tartrate
stirringthe resulting mixture was stirred for 30 min
extractionextracted with EtOAc (3×)
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-566e795948b54c92ab4d87d7bac386ee
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09321746B2

Reaction notes

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