Reaktion #1902879

Reaktionsgleichung

3-chloropropylsulfonylamine tert-butylcarbamate

n-BuLi

→

cyclopropylsulfonylamine tert-butyl carbamate

Lösungsmittel

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe dry ice bath was removed
2. 2
   Temperaturto warm to rt over a period of 2 h
3. 3
   SonstigeThe reaction mixture was quenched with glacial AcOH (3.4 mL)
4. 4
   Einengenconcentrated in vacuo
5. 5
   Sonstigepartitioned between CH2Cl2 (100 mL) and water (100 mL)
6. 6
   WaschenThe organic phase was washed with brine (100 mL)
7. 7
   Trocknendried (MgSO4)
8. 8
   Einengenconcentrated in vacuo

Vorschrift

Step IIc) A solution of n-BuLi (74.7 mL, 119.5 mmol, 1.6 M in hexane) was dissolved in dry THF (105 mL) and cooled to −78° C. under a Argon atmosphere. To this solution was added a solution of 3-chloropropylsulfonylamine tert-butylcarbamate (14 g, 54.3 mmol) in dry THF (105 mL) slowly dropwise over 20-30 min. The dry ice bath was removed and the reaction mixture was allowed to warm to rt over a period of 2 h. The reaction mixture was quenched with glacial AcOH (3.4 mL), concentrated in vacuo, and partitioned between CH2Cl2 (100 mL) and water (100 mL). The organic phase was washed with brine (100 mL), dried (MgSO4), and concentrated in vacuo to afford the cyclopropylsulfonylamine tert-butyl carbamate as a waxy offwhite solid (12.08 g, 100%): 1H NMR (CDCl3) δ 1.10 (m, 2H), 1.34 (m, 2H), 1.50 (s, 9H), 2.88 (m, 1H), 7.43 (s, 1H). 13C NMR (CDCl3) δ 6.21, 28.00, 31.13, 84.07, 149.82.

Quelle