反应详情

To a 1:1 dimethylformamide:water solution (170 ml) of [bis(trifluoroacetoxy)iodo]benzene (12.89 g, 32.29 mmol, 1.5 equiv) was added N-α-BOC-D-asparagine (5 g, 21.53 mmol, 1 equiv). This solution stirred at room temperature for 0.5 h before pyridine (3.4 g, 43.06 mmol, 2 equiv) was added. After 18 h the reaction was concentrated in vacuo and the residue was redissolved in water before being washed with diethyl ether (2×, 50 ml). The aqueous layer was concentrated in vacuo and the crude product was recrystallized from hot acetonitrile to give E7-1 (1.10 g, 25% yield).

1. additionwas added
2. concentrationAfter 18 h the reaction was concentrated in vacuo
3. dissolutionthe residue was redissolved in water
4. washbefore being washed with diethyl ether (2×, 50 ml)
5. concentrationThe aqueous layer was concentrated in vacuo
6. customthe crude product was recrystallized from hot acetonitrile
7. customto give E7-1 (1.10 g, 25% yield)