反応 #64421

反応方程式

sodium metaperiodate

tetrafluoroborate

L-carnitine

collidine

dichlorotetradecylphosphite

→

N,N,N-trimethyl-4-oxo-4-[(2-propenyl)oxyl]-2-[{hydroxy(tetradecyloxy)phosphinyl}oxy]-1-butanaminium hydroxide

溶媒

water

acetonitrile

acetonitrile

反応条件

後処理

1. 1
   workup.STIRRINGAfter stirring at room temperature for two hours
2. 2
   ろ過the reaction mixture is filtered through Celite
3. 3
   濃縮and the filtrate is concentrated under vacuum
4. 4
   その他chromatographed on silica gel, initially with a 50/30/5 ratio of methylene chloride/methanol/concentrated ammonium hydroxide

実験手順

To a solution of 3.6 gm of the tetrafluoroborate salt of the allyl ester of L-carnitine and 4.5 gm of collidine in 25 ml of acetonitrile is added 5.7 gm of dichlorotetradecylphosphite in 25 ml of acetonitrile. The reaction mixture is stirred at room temperature for 17 hours, and then a solution of 4 gm of sodium metaperiodate in 20 ml of water is added. After stirring at room temperature for two hours, the reaction mixture is filtered through Celite; and the filtrate is concentrated under vacuum. The resulting residue is flash chromatographed on silica gel, initially with a 50/30/5 ratio of methylene chloride/methanol/concentrated ammonium hydroxide and then with a 50/30/8 ratio of the same solvent system. Subsequent flash chromatography on LiChroprep RP-8 silica gel eluting initially with water and then with methanol gave N,N,N-trimethyl-4-oxo-4-[(2-propenyl)oxyl]-2-[{hydroxy(tetradecyloxy)phosphinyl}oxy]-1-butanaminium hydroxide, inner salt as an amorphous solid (31P NMR=0.108 ppm).

出典