Imidazole → HCID 178418251, compound

2-n-Butyl-4-chloro-5-hydroxymethylimidazole (50.0 g, 265 mmol, 1 eq.) was dissolved in glacial acetic acid (150 mL). A 1N cerricammonium nitrate (CAN) solution (575.0 mL, 595 mmol, 2.25 eq.) was then added dropwise to the stirred imidazole solution maintaining the temperature at 20°-30° C. After the addition was complete, an additional 10 mL of 1N CAN solution was added so that the mixture remained orange. After 3 hours, the reaction was cooled on ice and 50% NaOH (210 mL) was added to neutralize the acetic acid. The product precipitated. The pH was adjusted to 6 and the solids were filtered, washed with water (3×500 mL) and dried under high vacuum to yield 38.13 g of a white powder; M.P. 92.5°-93.5° C. NMR (200 MHz, CDCl3): δ11.83 (m, 1H); 9.64 (s, 1H); 2.85 (t, 2H, J= 7 Hz); 1.78 (t of t, 2H, J=7,7 Hz); 1.38 (t of q, 2H, J=7,7 Hz); 0.93 (t, 3H, J=7 Hz). Anal. calcd. for C8H11ClN2O: C, 51.48; H, 5.94; Cl, 19.00; N, 15.01. Found: C, 51.75; H, 5.82; Cl, 18.73; N, 14.87.

1. temperaturemaintaining the temperature at 20°-30° C
2. additionAfter the addition
3. additionwas added
4. customThe product precipitated
5. filtrationthe solids were filtered
6. washwashed with water (3×500 mL)
7. customdried under high vacuum

ORD record

ord-5da7b359611f44c4af3212299a96a30a

Source dataset

uspto-grants-1992_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05138069