反应详情

To a solution of 50 mg (53 μmol) 16-({[5-(aminomethyl)-4-hydroxy-3-methoxytetrahydro-2-furanyl]oxy}{5-[2,4-dioxo-3,4-dihydro-1 (2H)-pyrimidinyl]-3,4-dihydroxytetrahydro-2-furanyl}methyl)-9-(1-hydroxy-2-methylpropyl)-6-(2-iminohexahydro-4-pyrimidinyl)-2-isopropyl-4,7,10-trioxo-3,5,8,11,15-pentaazaheptadecane-1,17-dioic acid (λmax nm in water=259) in 0.4 ml of methanol is added 9.5 mg (2.0 eq., 110 μmol) of valeraldehyde and 3.3 mg (1.0 eq., 53 μmol) of sodium cyanoborohydride. After stirring for 5 minutes, 0.04 ml of 1 N methanolic hydrochloric acid is added. The reaction mixture is then stirred for 0.5 hour (the reaction is monitored by MS). The solvent is removed under reduced pressure to give a yellow gum. The desired product is identified by LC/MS and separated by preparative HPLC to give 4.9 mg (9.0% yield) of the desired product as a white solid.

1. stirringThe reaction mixture is then stirred for 0.5 hour (the reaction
2. customThe solvent is removed under reduced pressure
3. customto give a yellow gum