تفاعل #954

معادلة التفاعل

4-(N-tert-butyloxycarbonylaminomethyl) piperidine

N-benzyloxycarbonyl-S-methylisothiourea

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title product

المردود 37.0%

4-(N-tert-butyloxycarbonylaminomethyl)-1-(N-benzyloxycarbon ylamidino) piperidine

المردود 37.0%

المذيبات

ethanol

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe mixture was heated at 60°-70° C. for six hours
2. 2
   أخرىThe solvent was evaporated
3. 3
   workup.DISSOLUTIONthe residue was dissolved in CH2Cl2
4. 4
   غسيلThe organic layer was washed twice with 0.3M KHSO4 and once with brine
5. 5
   تجفيفThe combined organic layer was dried (Na2SO4)
6. 6
   ترشيحfiltered
7. 7
   أخرىevaporated
8. 8
   أخرىThe crude product was purified by flash chromatography

الإجراء التجريبي

7.8 g (36.4 mmole) of 4-(N-tert-butyloxycarbonylaminomethyl) piperidine and 8.98 g (40 mmole) of N-benzyloxycarbonyl-S-methylisothiourea was mixed in 25 mL ethanol. The mixture was heated at 60°-70° C. for six hours and left at room temperature for two days. The solvent was evaporated and the residue was dissolved in CH2Cl2. The organic layer was washed twice with 0.3M KHSO4 and once with brine. The combined organic layer was dried (Na2SO4), filtered and evaporated. The crude product was purified by flash chromatography using a stepwise gradient of CH2Cl2 /MeOH (100/0, 97/3, 95/5, 90/10) as eluent to yield 5.22 g (37%) of the title product.

المصدر