Tert-butyl 4-(methylsulfonyl)piperidine-1-carboxylate → tert-Butyl 4-(acetylthio)piperidine-1-carboxylate

HRID 390994Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11](S(C)(=O)=O)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:18]([O-:21])(=[S:20])[CH3:19].[Na+]>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([S:20][C:18](=[O:21])[CH3:19])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 4-methanesulfonyl-piperidine-carboxylic acid tert-butyl ester (2.82 g), sodium thioacetate (2.31 g) and DMF (40 ml) was stirred at 60° C. After 4 hours the reaction mixture was cooled and partitioned between ethyl acetate and brine. The combined organics were dried (MgSO4) and the solvents removed in vacuo. The resulting crude mixture was purified by flash chromatography to yield 4-acetylsulfanyl-piperidine-1-carboxylic acid tert-butyl ester (1.8 g).

Workup

temperatureAfter 4 hours the reaction mixture was cooled
custompartitioned between ethyl acetate and brine
dry with materialThe combined organics were dried (MgSO4)
customthe solvents removed in vacuo
customThe resulting crude mixture was purified by flash chromatography

Sources & evidence

ORD record: ord-9d16d40425434ea8a3f4369e6c0e7620
Source dataset: uspto-grants-2013_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08383620B2

Reaction notes

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