HRID1264397

反应详情

EQUATION

反应方程式

HRID 1264397 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

A solution of 800 mg (1.38 mmol) (2S,4R)-1-(Naphthalene-2-sulfonyl)-4-tritylsulfanyl-pyrrolidine-2-carboxylic acid and 390 mg (1.66 mmol) crude phenethylamino-acetic acid tert-butyl ester in 14 ml THF was cooled to 0° C. and treated with 318 mg (1.66 mmol) EDCI and 19 mg (0.14 mmol) HOBT. The reaction was warmed up to RT over night and partitioned between aqueous 10% KHSO4/ethyl acetate (3×). The organic phases were washed with aqueous saturated NaHCO3 solution and dried over Na2SO4. Purification by flash-chromatography on silicagel (Hexane/EtOAc 4:1 to 1:1) gave 290 mg (26%) (2S,4R)-{[1-(Naphthalene-2-sulfonyl)-4-tritylsulfanyl-pyrrolidine-2-carbonyl]-phenethyl-amino}-acetic acid tert-butyl ester, MS: 797 (MH+)

WORKUP

后处理

  1. custompartitioned between aqueous 10% KHSO4/ethyl acetate (3×)
  2. washThe organic phases were washed with aqueous saturated NaHCO3 solution
  3. dry with materialdried over Na2SO4
  4. customPurification by flash-chromatography on silicagel (Hexane/EtOAc 4:1 to 1:1)