tert-butyl 4-(isoquinolin-5-yl)piperazine-1-carboxylate synthesis

5synthesis methods

Product Name:tert-butyl 4-(isoquinolin-5-yl)piperazine-1-carboxylate
CAS Number:444620-69-3
Molecular formula:C18H23N3O2
Molecular Weight:313.39

24424-99-5 Synthesis

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209733-17-5 Synthesis

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tert-butyl 4-(isoquinolin-5-yl)piperazine-1-carboxylate

444620-69-3
22 suppliers
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Yield:444620-69-3 0.86 g

Reaction Conditions:

with sodium hydroxide in 1,4-dioxane;Cooling with ice;

Steps:

To 5-(piperazin-l-yl)isoquinoline, HCl (0.58 g, 2.322 mmol) and NaOH (5.1 1 mL, 5.11 mmol) in dioxane (6 mL), cooled in ice bath, was added BOC2O (0.539 mL, 2.322 mmol) in dioxane (6 mL). The organics were stripped and the reaction was partitioned with H2O (30mL) and EtOAc (100 mL). The organic layer was washed with brine (15 mL) and dried (MgSO₄). Collected Boc-protected compound as a yellow oil (0.86 g) which was then hydrogenated at 55 psi with PtO2 in EtOH. The crude product was then filtered through Celite and collected 0.73g (99%) of the desired product as a off-white solid. MS (ESI) m/z: 318.1 (M+H)⁺.

References:

WO2013/56060,2013,A1 Location in patent:Paragraph 00269

34784-04-8 Synthesis