Sodium Iodide → 2-Chloro-3-(3-methyl-2-butenyloxy)-6-(1-hydroxyethyl)-4-iodo-pyridine

Temperature

0 °C

2-Chloro-3-hydroxy-6-(1-hydroxyethyl)-4-iodo-pyridine (2.99 g, 10 mmole) was dissolved in 15 ml dry dimethylformamide in an oven dried 100 ml two neck round bottom flask under nitrogen. The solution was cooled to 0° C., was treated with sodium hydride (400 mg, 10 mmole), and the mixture was stirred 1 h at room temperature. The mixture was treated with 1-chloro-3-methyl-2-butene (1.2 ml, 11 mmole) and sodium iodide (150 mg, 1 mmole) and the reaction mixture was stirred 18 h at room temperature. The reaction mixture was diluted with 100 ml ethyl acetate, was washed with 4×50 ml 50% saturated 1:1 sodium chloride/sodium bicarbonate, and was dried over anhydrous potassium carbonate. The dried organics were concentrated in vacuo to a yellow oil which was crystallized from 25 ml hexane to give 3.2 g (87%) of 2-chloro-3-(3-methyl-2-butenyloxy)-6-(1-hydroxyethyl)-4-iodo-pyridine as an off-white solid, Melting Point: 80-81° C.

1. dry with materialdried 100 ml two neck round bottom flask under nitrogen
2. stirringthe reaction mixture was stirred 18 h at room temperature
3. washwas washed with 4×50 ml 50% saturated 1:1 sodium chloride/sodium bicarbonate
4. dry with materialwas dried over anhydrous potassium carbonate
5. concentrationThe dried organics were concentrated in vacuo to a yellow oil which
6. customwas crystallized from 25 ml hexane

ORD record

ord-1b0d652c04b547f49580987b68fc3e02

Source dataset

uspto-grants-2000_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06043248