Hydrochloric Acid → (6-Chloropyridazin-3-yl)methanol

Temperature

0 °C

In tetrahydrofuran (100 mL) was dissolved methyl 6-chloropyridazin-3-carboxylate (1.726 g), the solution was cooled to 0° C., 1M diisobutyaluminum hydride-tetrahydrofuran solution (20 mL) was added dropwise to the solution, and the mixture was stirred at the same temperature for 20 minutes. To the reaction mixture were successively added water (10 mL) and 1N hydrochloric acid (20 mL) at 0° C. After adding a saturated aqueous sodium bicarbonate solution to the mixture at room temperature, the mixture was extracted with chloroform. The extract was dried over anhydrous sodium sulfate, and the residue obtained by concentrating the extract under reduced pressure was purified by silica gel column chromatography (n-hexane:ethyl acetate=90:10 to 25:75) to obtain (6-chloropyridazin-3-yl)methanol (177 mg).

1. customat 0° C
2. extractionthe mixture was extracted with chloroform
3. dry with materialThe extract was dried over anhydrous sodium sulfate
4. customthe residue obtained
5. concentrationby concentrating the
6. extractionextract under reduced pressure
7. customwas purified by silica gel column chromatography (n-hexane:ethyl acetate=90:10 to 25:75)

ORD record

ord-386545005abc476c9ae7e4494f3e243d

Source dataset

uspto-grants-2016_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09302996B2