Thionyl Chloride → N-(4-[2-(4-methyl-2-oxo-piperidine-1-carboxamido)-ethyl]-benzenesulfonyl)-N'-butyl urea

HRID 1701973Notes

Reaction equation

[CH3:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([NH:10][CH2:11][CH2:12][C:13]2[CH:18]=[CH:17][C:16]([S:19]([OH:21])=[O:20])=[CH:15][CH:14]=2)=[O:9])[C:4](=[O:22])[CH2:3]1.O[NH:24][C:25]([NH:27][CH2:28][CH2:29][CH2:30][CH3:31])=[O:26].S(Cl)(Cl)=O>O1CCOCC1>[CH3:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([NH:10][CH2:11][CH2:12][C:13]2[CH:14]=[CH:15][C:16]([S:19]([NH:24][C:25]([NH:27][CH2:28][CH2:29][CH2:30][CH3:31])=[O:26])(=[O:21])=[O:20])=[CH:17][CH:18]=2)=[O:9])[C:4](=[O:22])[CH2:3]1

Participants

Conditions

Temperature: 60 °C

Procedure

0.6 g of 4-[2-(4-methyl-2-oxo-piperidine-1-carboxamido)-ethyl]-benzenesulfinic acid (crude product m.p. 113°-115° C., prepared by reaction of 4-[2-(4-methyl-2-oxo-piperidine-1-carboxamido)-ethyl]-benzenesulfochloride with sodium sulfite) and 0.3 g of N-hydroxy-N'-butyl urea are dissolved in 50 ml of dioxan. 0.4 g of thionyl chloride in 10 ml of dioxan is added dropwise to this solution, and the batch is heated for 2 hours at 60° C. Subsequently, the solvent is evaporated under reduced pressure, water is added dropwise to the residue, the oily substance is separated and reprecipitated from ammonia. The N-(4-[2-(4-methyl-2-oxo-piperidine-1-carboxamido)-ethyl]-benzenesulfonyl)-N'-butyl urea obtained has a melting point of 155°-157° C., and, with the substance obtained according to Example 8, shows no depression.

Workup

customSubsequently, the solvent is evaporated under reduced pressure, water
additionis added dropwise to the residue
customthe oily substance is separated
customreprecipitated from ammonia

Sources & evidence

ORD record: ord-a859a06453f64f2aaadcec60d2475987
Source dataset: uspto-grants-1983_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04379785

Reaction notes

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