반응 #1885035

반응 방정식

NaOH

tert-butyl 4-(3,5-dichlorophenyl)-2-methoxypyrrolidine-1-carboxylate

sodium borohydride

→

tert-butyl-3-(3,5-dichlorophenyl)pyrrolidine-1-carboxylate

수율 100.0%

용매

acetic acid

반응 조건

후처리

1. 1
   기타Synthesized
2. 2
   추출extracted with ethyl acetate (3×500 mL)
3. 3
   건조The combined organic extracts were dried over Na2SO4
4. 4
   여과filtered through a pad of Celite
5. 5
   농축concentrated under reduced pressure

실험 절차

Synthesized according to General procedure 3. To a stirred solution of tert-butyl 4-(3,5-dichlorophenyl)-2-methoxypyrrolidine-1-carboxylate (20 g, 0.058 mol) in acetic acid (200 mL) under N2 at 0° C. was added sodium borohydride (4.37 g, 0.116 mol) in portions over 20 minutes. The resulting solution was allowed to warm to RT and then stirred at RT for 1 hour. The reaction mixture was slowly poured into 2 M aqueous NaOH solution (500 mL) and extracted with ethyl acetate (3×500 mL). The combined organic extracts were dried over Na2SO4, filtered through a pad of Celite and then concentrated under reduced pressure to afford tert-butyl-3-(3,5-dichlorophenyl)pyrrolidine-1-carboxylate as a brown oil (18.3 g, 0.058 mol, 100% yield). 1H-NMR (400 MHz, CDCl3) δ 7.28-7.24 (m, 1H), 7.13 (d, J=1.3 Hz, 2H), 3.80-3.76 (m, 1H), 3.65 (t, J=8.4 Hz, 1H), 3.56 (t, J=8.1 Hz, 1H), 3.46-3.39 (m, 1H), 3.35-3.23 (m, 1H), 2.27 (d, J=4.3 Hz, 1H), 2.01-1.93 (m, 1H) and 1.51 (s, 9H) ppm.

출처