反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
PROCEDURE
实验过程
A solution of 3 g of methyl 2-[N2 -(6,7-dimethoxy-2-naphthalenesulfonyl)-L-arginyl]-1,2,3,4-tetrahydroisoquinoline-3-carboxylate in 15 ml of methanol and 5 ml of 2N NaOH solution was warmed to 50° C and held at that temperature for 15 hours. At the end of this period, the reaction mixture was concentrated and chromatographed on 200 ml of Daiaion® SK 102 ion exchange resin (200-300 mesh, H+ form, manufactured by Mitsubishi Chemical Industries Limited) packed in water, washed with ethanol-water (1:4) and eluted with ethanol-water-NH4OH (10:9:1). The main fraction was evaporated to dryness and washed with ether to give 1.6 g of 2-[N2 -(6,7-dimethoxy-2-naphthalenesulfonyl)-L-arginyl]-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid.
WORKUP
后处理
- concentrationAt the end of this period, the reaction mixture was concentrated
- customchromatographed on 200 ml of Daiaion® SK 102 ion exchange resin (200-300 mesh, H+ form, manufactured by Mitsubishi Chemical Industries Limited)
- washwashed with ethanol-water (1:4)
- washeluted with ethanol-water-NH4OH (10:9:1)
- customThe main fraction was evaporated to dryness
- washwashed with ether