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4-Hydrazino-piperidine-1-carboxylic acid benzyl ester synthesis

2synthesis methods
280111-50-4 Synthesis
Benzyl 4-(2-(tert-butoxycarbonyl)hydrazinyl)piperidine-1-carboxylate

280111-50-4
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4-Hydrazino-piperidine-1-carboxylic acid benzyl ester

280111-51-5
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Yield:280111-51-5 70.4%

Reaction Conditions:

with trifluoroacetic acid in dichloromethane at 20;

Steps:

2.43.2 Step 2:

To a solution of benzyl 4-(2-(tert-butoxycarbonyl)hydrazinyl)piperidine-1- carboxylate (2.60 g, 7.4 mmol) in DCM (40 mL) was added TFA (10 mL) dropwise. The reaction mixture was stirred at room temperature overnight. The reaction was evaporated to remove solvent to give benzyl 4-hydrazinylpiperidine-1-carboxylate (2.19 g, yield: 70.4%) as a yellow oil. MS: m/z 250.4 (M+H+).

References:

WO2021/133915,2021,A1 Location in patent:Paragraph 00409