Iodine → 2,4,6-Trichloro-5-iodopyrimidine

Temperature

25 °C

A dry, argon-filled Schlenk tube with a magnetic stirrer bar and septum is initially charged with 2,4,6-trichloropyrimidine (184 mg, 1 mmol) in anhydrous THF (1 ml). After adding (TMP)2Zn.MgCl2 (3.16 ml, 1.2 mmol) at 25° C., the mixture is stirred for 1 h. Then a solution of iodine (355 mg, 1.4 mmol), dissolved in anhydrous THF (2 ml), is added dropwise and the reaction mixture is stirred at 25° C. for 1 h. After dilution with aqueous sat. NH4Cl solution (30 ml) and extraction with ethyl acetate (3×30 ml), the combined organic phases are dried over Na2SO4, and distillative removal of the solvent and purification by column chromatography on silica gel (heptane:ethyl acetate) afforded the desired compound (240 mg, 78% of theory) as a colourless crystalline product.

1. additionA dry, argon-filled Schlenk tube with a magnetic stirrer bar
2. additionAfter adding (TMP)2Zn
3. additionis added dropwise
4. extractionAfter dilution with aqueous sat. NH4Cl solution (30 ml) and extraction with ethyl acetate (3×30 ml)
5. dry with materialthe combined organic phases are dried over Na2SO4, and distillative removal of the solvent and purification by column chromatography on silica gel (heptane:ethyl acetate)

ORD record

ord-ccac1d45cabd4a73a86d36d6902e89bc

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09334292B2