3-Chloro-2,5-diethylpyrazine → 3-Chloro-5-cyclopropyl-2-methylpyrazine

Reaktionsgleichung

[Cl:1][C:2]1[C:3]([CH2:10][CH3:11])=[N:4][CH:5]=[C:6]([CH2:8]C)[N:7]=1.[CH:12]1([CH:15]2[NH:20][C:19](=O)[CH:18]([CH2:22]C)[NH:17][C:16]2=O)[CH2:14][CH2:13]1>>[Cl:1][C:2]1[C:3]([CH:10]2[CH2:11][CH2:12]2)=[N:4][CH:5]=[C:6]([CH3:8])[N:7]=1.[Cl:1][C:19]1[C:18]([CH3:22])=[N:17][CH:16]=[C:15]([CH:12]2[CH2:14][CH2:13]2)[N:20]=1

Komponenten

Edukt 2

HCID 2373953-Chloro-2,5-diethylpyrazine

HCID 221475383-Cyclopropyl-6-ethylpiperazine-2,5-dione

Produkt 2

HCID 221473143-Chloro-5-cyclopropyl-2-methylpyrazine

HCID 221475313-Chloro-2-cyclopropyl-5-methylpyrazine

Versuchsvorschrift

Following the procedure for the preparation of 3-chloro-2,5-diethylpyrazine but substituting 3-cyclopropyl-6-ethylpiperazine-2,5-dione and making non-critical variations provided 3-chloro-2-cyclopropyl-5-methylpyrazine (A) and 3-chloro-5-cyclopropyl-2-methylpyrazine (B) as oils. Analytical data for 3-chloro-2-cyclopropyl-5-ethylpyrazine (A): 1H NMR (CDCl3) δ 1.06-1.10, 1.28-1.33, 2.42-2.51, 2.73-2.81, 8.18; Analytical data for 3-chloro-5-cyclopropyl-2-ethylpyrazine (B): 1H NMR (CDCl3) δ 1.04-1.08, 1.24-1.39, 1.97-2.06, 2.88-2.95, 8.31.