Ammonium Chloride → (2,5-Dichloropyridin-3-yl)(2-fluoro-3-methoxy-6-vinylphenyl)methanol

HRID 1987142Notes

Reaction equation

[Li]CCCC.Br[C:7]1[C:8]([Cl:14])=[N:9][CH:10]=[C:11]([Cl:13])[CH:12]=1.[F:15][C:16]1[C:23]([O:24][CH3:25])=[CH:22][CH:21]=[C:20]([CH:26]=[CH2:27])[C:17]=1[CH:18]=[O:19].[NH4+].[Cl-]>C(OC(C)C)(C)C.C1C=CC=CC=1>[Cl:14][C:8]1[C:7]([CH:18]([C:17]2[C:20]([CH:26]=[CH2:27])=[CH:21][CH:22]=[C:23]([O:24][CH3:25])[C:16]=2[F:15])[OH:19])=[CH:12][C:11]([Cl:13])=[CH:10][N:9]=1

Participants

Conditions

Temperature: -78 °C

Procedure

To a stirred solution of nBuLi (1.6 M in hexane, 29.0 mL, 46.4 mmol) in diisopropyl ether (80 mL) was added 3-bromo-2,5-dichloropyridine (10.5 g, 46.4 mmol) in diisopropylether (60 mL) slowly at −78° C. The resulting suspension was treated with 2-fluoro-3-methoxy-6-vinylbenzaldehyde (7.6 g, 42.2 mmol) in diisopropylether (60 mL) and benzene (3 mL), and allowed to stir at −78° C. for 30 min followed by warming to room temperature as the bath did. The mixture was treated with saturated NH4Cl solution and extracted with EtOAc (×3). The combined organics were washed with brine, dried (Na2SO4), concentrated, and purified by flash chromatography to afford the title compound.

Workup

temperatureby warming to room temperature as the bath
extractionextracted with EtOAc (×3)
washThe combined organics were washed with brine
dry with materialdried (Na2SO4)
concentrationconcentrated
custompurified by flash chromatography

Sources & evidence

ORD record: ord-006c1b9c4aad460b908701196ca4ad03
Source dataset: uspto-grants-2009_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07550478B2

Reaction notes

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