Реакция #69588

Уравнение реакции

2-pyridinecarbonyl chloride

(2S)-1-[(4-chlorophenyl)sulfonyl]-2-methylpiperazine hydrochloride

triethylamine

→

title compound

Выход 72.6%

(2S)-1-[(4-Chlorophenyl)sulfonyl]-2-methyl-4-(2-pyridinylcarbonyl)piperazine hydrochloride

Выход 72.6%

Растворители

DCM

Условия реакции

Обработка

1. 1
   Температураto warm to rt
2. 2
   workup.STIRRINGstirring
3. 3
   ДругоеThe sample was evaporated
4. 4
   Другоеthe crude residue was purified by silica chromatography (5 g silica SPE)
5. 5
   Промывка(eluting a gradient from 20-90% ethyl acetate in hexane) and the product
6. 6
   workup.ADDITIONcontaining fractions
7. 7
   Концентрированиеwere concentrated
8. 8
   workup.DISSOLUTIONThe product was then dissolved in 1,4-dioxane (2 ml) to
9. 9
   workup.ADDITIONthis was added 1M ethereal HCl (4 ml) the sample
10. 10
    Другоеwas evaporated
11. 11
    Другоеtriturated in diethyl ether until solid
12. 12
    ДругоеThe solid was dried under vacuum at 40° C. for 18 hours

Методика

To a solution of (2S)-1-[(4-chlorophenyl)sulfonyl]-2-methylpiperazine hydrochloride (Description 4) (200 mg, 0.728 mmol) in DCM (8 mL) was added triethylamine (0.172 ml, 1.237 mmol) and the reaction was cooled to 0° C. and stirred under argon. 2-pyridinecarbonyl chloride (155 mg, 0.873 mmol) was added portionwise and the reaction was slowly allowed to warm to rt, stirring continued for 18 hours. The sample was evaporated, the crude residue was purified by silica chromatography (5 g silica SPE), (eluting a gradient from 20-90% ethyl acetate in hexane) and the product containing fractions were concentrated. The product was then dissolved in 1,4-dioxane (2 ml) to this was added 1M ethereal HCl (4 ml) the sample was evaporated and then triturated in diethyl ether until solid. The solid was dried under vacuum at 40° C. for 18 hours to yield the title compound as a white solid (110 mg)

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