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
Thz-DVal-Leu-resin which was prepared from Fmoc-Leu-resin in the same manner described in Example 4, was unpacked from a reaction column and allowed to react with 2.5 equivalents of the symmetrical acid anhydride of Fmoc-nAsp(OtBu)(prepared previously from Fmoc-DAsp(OtBu) and DCC) and DMAP(10 mg) in DMF at room temperature for 3 h with occasional shaking. After removal of excess reagents, the resin was washed successively with DMF, tert-amyl alcohol, acetic acid, tert-amyl alcohol and DMF, and repacked in a reaction column. The further solid-phase peptide synthesis was performed by the standard protocol described in Example 4. The resulting DTrp-DAsp(OtBu)-Thz-DVal-Leu-resin was treated in the same manner described in Example 4 to give the title compound.
WORKUP
后处理
- customwas unpacked from a reaction column
- customAfter removal of excess reagents
- washthe resin was washed successively with DMF, tert-amyl alcohol, acetic acid, tert-amyl alcohol and DMF
- customrepacked in a reaction column