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methyl 5-(4-(tert-butoxycarbonyl)piperazin-1-yl)pyrazine-2-carboxylate synthesis

3synthesis methods
57260-71-6 Synthesis
tert-Butyl 1-piperazinecarboxylate

57260-71-6
738 suppliers
$5.00/5g

33332-25-1 Synthesis
Methyl 5-chloropyrazine-2-carboxylate

33332-25-1
246 suppliers
$8.00/1g

methyl 5-(4-(tert-butoxycarbonyl)piperazin-1-yl)pyrazine-2-carboxylate

1215626-40-6
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Yield:1215626-40-6 96%

Reaction Conditions:

with triethylamine in N,N-dimethyl-formamide at 80; for 3 h;

Steps:

84.1; 86.1 Step 1: Synthesis of methyl 5-[4-(tert-butoxycarbonyl)piperazin-1-yl]pyrazine- 2-carboxylate

methyl 5-chloropyrazine-2-carboxylate (532 mg, 3.08 mmol) and tert- butyl piperazine-1-carboxylate (631 mg, 3.39 mmol) were dissolved in DMF (4.85 mL). TEA (0.86 mL, 6.17 mmol) was added and the reaction mixture was heated at 80 °C for 3 hours. The reaction mixture was poured into water and filtered. The filtercake was dried under a stream of nitrogen while applying vacuum to yield the title compound (950 mg, 96%).

References:

WO2021/226262,2021,A1 Location in patent:Page/Page column 209; 212

57260-71-6 Synthesis
tert-Butyl 1-piperazinecarboxylate

57260-71-6
738 suppliers
$5.00/5g

23611-75-8 Synthesis
2-Chloro-6-pyrazinecarboxylic acid methyl ester

23611-75-8
127 suppliers
$9.00/250mg

methyl 5-(4-(tert-butoxycarbonyl)piperazin-1-yl)pyrazine-2-carboxylate

1215626-40-6
7 suppliers
inquiry