Diisopropylethylamine → Benzyl sulfamic acid-[6-chloro-5-(p-chloro-phenyl)-4-pyrimidinyl]-amide

To 4,6-dichloro-5-(4-chloro-phenyl)-pyrimidine (Referential Example 9) (2.59 g) dissolved in DMSO (14 ml) was added di-isopropyl-ethyl-amine (1.8 ml) followed by the addition of benzyl sulfamic acid amide potassium salt (2.25 g) [prepared from the product described in Referential Example 22 and potassium tert.-butylate in methanol followed by the evaporation of the solvent]. The mixture was stirred for 24 h at rt then poured onto water (300 ml) and diethylether (120 ml) was added and the solution was stirred for 30 min. The layers were separated and the water layer was acidified with solid citric acid (pH=3) and cooled to 0° C. for 1 h. The precipitated product was filtered off, washed with water and recrystallized from methanol to give benzyl sulfamic acid-[6-chloro-5-(p-chloro-phenyl)-4-pyrimidinyl]-amide (1.8 g). tR=4.94 min (LC); [M+H]+410.90 (ES+);

1. customprepared from the product
2. customfollowed by the evaporation of the solvent]
3. additionthen poured onto water (300 ml) and diethylether (120 ml)
4. additionwas added
5. stirringthe solution was stirred for 30 min
6. customThe layers were separated
7. temperaturecooled to 0° C. for 1 h
8. filtrationThe precipitated product was filtered off
9. washwashed with water
10. customrecrystallized from methanol

ORD record

ord-101c7ac50baf4d4999c44b012e398b23

Source dataset

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07094781B2