반응 #50360

반응 방정식

(2R,3S,4S,5R)-5-(Triethylsilyloxy)-2,3-epoxy-2,4-dimethyl-1-octanol

n-butyllithium

Rochelle's salt

samarium diiodide

→

31

(2S,3S,4S,5R)-5-(Triethylsilyloxy)-3-hydroxy-2,4-dimethyloctanal

용매

THF

H2O

Et2O

반응 조건

후처리

1. 1
   기타at 0° C.
2. 2
   기타The layers were separated
3. 3
   추출extracted with ether (3×5 ml)
4. 4
   세척washed with 5% NaHCO3 (2×1 ml), brine (1×1 ml)
5. 5
   건조dried over MgSO4
6. 6
   농축concentrated

실험 절차

(2R,3S,4S,5R)-5-(Triethylsilyloxy)-2,3-epoxy-2,4-dimethyl-1-octanol (21.0 mg, 69.4 μmol) in 300 μl of THF at 0° C. was deprotonated with 1.05 eq of n-butyllithium. After 15 min, 0.1M samarium diiodide (764 μmol, 1.1 eq) was added and the reaction was allowed to warm to 25° C. over night. Then 1 ml of 1/2 saturated Rochelle's salt was added, stirred an additional 1 h, and poured onto 5 ml of Et2O and 1 ml of H2O. The layers were separated, extracted with ether (3×5 ml), washed with 5% NaHCO3 (2×1 ml), brine (1×1 ml), dried over MgSO4 and concentrated to give 31 crude.

출처