Thionyl Chloride → 4-Chloro-2-(chloromethyl)pyridine

To a mixture of (4-chloro-pyridine-2-yl)-methanol (146.8 mg, 1.0 mmol) described in Manufacturing Example 51-1-1 and toluene (3 mL) was added thionyl chloride (112 μL, 1.53 mmol) on an ice bath, which was stirred for 1 hour 15 minutes at room temperature. Saturated aqueous sodium hydrogencarbonate solution was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure and the residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=4:1) to obtain the title compound (97 mg, 59%).

1. extractionwas then extracted with ethyl acetate
2. customThe organic layer was separated
3. washwashed with water and saturated aqueous sodium chloride
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationThe filtrate was concentrated under a reduced pressure
7. customthe residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=4:1)

ORDレコード

ord-fa95637049d440f1a51b74ae8301040d

出典データセット

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08841327B2