The common heterocyclic compound, 32779-36-5, name is 5-Bromo-2-chloropyrimidine, molecular formula is C4H2BrClN2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route. 32779-36-5
Step 1. 5-Bromo-N-cyclopropylpyrimidin-2-amine A solution of 5-bromo-2-chloropyrimidine (3.87 g, 20 mmol) and cyclopropylamine (5.7 g, 0.1 mol) in 20 mL THF was heated at 65¡ã C. for 5 hrs in a sealed tube. The mixture was evaporated in vacuo, to the residue ethanol was added, after filtration, the cake was washed with ethanol to give 4.07 g product as a colorless solid (95.5percent). 1H NMR (300 MHz, CDCl3) delta: 8.32 (2H, s), 5.58 (1H, brs), 2.72 (1H, brs), 0.82-0.84 (2H, m), 0.54 (2H, brs). LCMS: m/z [M+H]+ 214.0011.
The synthetic route of 32779-36-5 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Astar Biotech LLC; YU, Chunrong; Huang, Haihong; Zhang, Dongfeng; Li, Peng; US2014/31354; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia