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ChemicalBook CAS DataBase List 1-BOC-4-(PIPERIDIN-4-YL)-PIPERAZINE

1-BOC-4-(PIPERIDIN-4-YL)-PIPERAZINE synthesis

4synthesis methods
926904-28-1 Synthesis
tert-butyl 4-(1-((benzyloxy)carbonyl)piperidin-4-yl)piperazine-1-carboxylate

926904-28-1
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Yield:205059-24-1 86%

Reaction Conditions:

with hydrogen;5% Pd(II)/C(eggshell) in tetrahydrofuran;water for 16 h;

Steps:

1.b
b. Intermediate 3 (101 g, 255 mmol) was given to THF (1 L), Pd/C-5% (22.0 g, 52,3 % water) was added. It was stirred under hydrogen atmosphere and standard pressure for 16 h. Ca. 6 L hydrogen were used up. The reaction mixture was filtrated and concentrated in vacuo until dryness. The yellowish-oily product 4 crystallized slowly und was used without further processing (58.9 g, 219 mmol, 86%).

References:

MERCK PATENT GMBH;SCHIEMANN, Kai;SCHULTZ, Melanie;STAEHLE, Wolfgang WO2010/115491, 2010, A2 Location in patent:Page/Page column 84-85

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