反应详情

A mixture of t-Boc-Val-OSu (3.14 g, 10 mmol) and H-Lys(CBZ)-OCH3.HCl (3.31 g, 10 mmol) in THF (300 ml) was treated at room temperature with triethylamine (1.38 ml) and left stirring for 17 hr. The resulting solution was evaporated in vacuo and the residue was dissolved in EtOAc (500 ml). The organic solution was washed successively with water (2×200 ml), 5% citric acid (2×200 ml), water (2×200 ml) and dried over Na2SO4. The dried solution was filtered and evaporated in vacuo to give (VI) (4.9 g; 99%) as a foam. T.l.c. RfE4 =0.64.

1. waitleft
2. customThe resulting solution was evaporated in vacuo
3. dissolutionthe residue was dissolved in EtOAc (500 ml)
4. washThe organic solution was washed successively with water (2×200 ml), 5% citric acid (2×200 ml), water (2×200 ml)
5. dry with materialdried over Na2SO4
6. filtrationThe dried solution was filtered
7. customevaporated in vacuo