Dimethyl Sulfoxide → 4-(Azidopropoxy)-2,6-diformyl-pyridine

Temperatur

-78 °C

DMSO (1.21 mL, 17.1 mmol) was diluted with CH2Cl2 (approximately 25 mL) and cooled to −78° C. Oxalyl chloride (0.745 mL, 8.45 mmol) was added dropwise and the reaction mixture was stirred for 15 minutes. 4-(3-azidopropoxy)-2,6-dihydroxymethylpyridine (1 g, 4.27 mmol) dissolved in CH2Cl2 (10 mL) was added slowly to the cooled reaction mixture. After 0.5 hour triethylamine (2.77 mL, 19.70 mmol) was added dropwise to the reaction mixture. The dry ice/acetone bath was removed and the reaction mixture was warmed to room temperature for approximately 40 minutes. The reaction mixture was partitioned between CH2Cl2 and water and extracted several times with CH2Cl2. The CH2Cl2 layers were combined, dried (MgSO4) and concentrated in vacuo. The resulting residue was purified by silica gel flash column chromatography to give the title compound.

1. additionwas added slowly to the cooled reaction mixture
2. customThe dry ice/acetone bath was removed
3. temperaturethe reaction mixture was warmed to room temperature for approximately 40 minutes
4. customThe reaction mixture was partitioned between CH2Cl2 and water
5. extractionextracted several times with CH2Cl2
6. dry with materialdried (MgSO4)
7. concentrationconcentrated in vacuo
8. customThe resulting residue was purified by silica gel flash column chromatography

ORD-Eintrag

ord-6f35f4ce01564e848ee07d1a66ed04d3

Quelldatensatz

uspto-grants-2001_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06197965B1