HRID414000

反应详情

EQUATION

反应方程式

HRID 414000 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

2

PROCEDURE

实验过程

To a solution of Fmoc-Glu(OBut)-Arg(Pmc)-Val-Asp(OAllyl)-OBzl (SEQ ID NO: 37) (12.3 g, 10.3 mmol) in 105 mL of dichloromethane is added piperidine (3.5 g, 41.3 mmol) at ambient temperature. The mixture is stirred 2 hours, then diluted with heptane, concentrated to half volume, and left standing in the freezer overnight. The liquor is decanted from the oily residue, which is then taken up in dichloromethane. The solution is washed with 0.5M aqueous citric acid, water, and brine, dried (magnesium sulfate), filtered, and concentrated. The crude solid is triturated twice with heptane and filtered to give 9.0 g of Glu(OtBu)-(L)Arg(Pmc)-Val-Asp(OAllyl)-OBzl as a white powder. (Mcalc 970.2; M+1obsvd 971).

WORKUP

后处理

  1. concentrationconcentrated to half volume
  2. waitleft
  3. customstanding in the freezer overnight
  4. customThe liquor is decanted from the oily residue, which
  5. washThe solution is washed with 0.5M aqueous citric acid, water, and brine
  6. dry with materialdried (magnesium sulfate)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude solid is triturated twice with heptane
  10. filtrationfiltered