Methylhydrazine → 2-Methyl-2-[(4-chlorophenyl)sulfonyl] hydrazine
Reaction equation
[CH3:1][NH:2][NH2:3].C(N(CC)CC)C.[Cl:11][C:12]1[CH:17]=[CH:16][C:15]([S:18](Cl)(=[O:20])=[O:19])=[CH:14][CH:13]=1>C1COCC1>[CH3:1][N:2]([S:18]([C:15]1[CH:16]=[CH:17][C:12]([Cl:11])=[CH:13][CH:14]=1)(=[O:20])=[O:19])[NH2:3]Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
Into a 100 mL three necked round bottom flask equipped with a mechanical stirrer, thermometer, and dropping funnel under an atmosphere of nitrogen was added THF (25 mL), methylhydrazine (2.53 g, 2.92 mL, 55 mmol), and triethylamine (4.35 g, 43 mmol). The temperature of the mixture was lowered to approximately 5° C. and crude 4-chlorophenylsulfonyl chloride (10.5 g, 50 mmol, contained 4-chlorophenyl sulfonic acid) dissolved in 25 mL of THF was added dropwise at a rate such that the temperature did not rise over 10° C. The cooling bath was removed and the mixture was allowed to warm to stir overnight at RT. Ether (100 mL was added to the reaction mixture and the resulting slurry was washed with water (50 mL), brine (50 mL), dried (Na2SO4), and the solvent was removed in vacuo to give 5.4 g (49% yield) of 2-methyl-2-[(4-chlorophenyl)sulfonyl] hydrazine. 1H NMR (CDCl3) δ 7.8 (d, 2H), 7.6 (d, 2H), 3.6 (s, b, 2H), 2.9 (s, 3H).
Workup
- customwas lowered to approximately 5° C.
- additionwas added dropwise at a rate such that the temperature
- customdid not rise over 10° C
- customThe cooling bath was removed
- temperatureto warm
- additionEther (100 mL was added to the reaction mixture
- washthe resulting slurry was washed with water (50 mL), brine (50 mL)
- dry with materialdried (Na2SO4)
- customthe solvent was removed in vacuo
Sources & evidence
- ORD record
- ord-fab494bf9deb4dcfb42cc1f6c104e65b
- Source dataset
- uspto-grants-2000_01
- Patent number
- US06015826
Reaction notes
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