反应详情

To DMF (50 mL) suspension of potassium carbonate (6.2 g) was added dropwise DMF (70 mL) solution of Nα-tert-butoxycarbonyl-1-formyl-L-tryptophan (10.0 g) at 0° C., and the mixture was stirred for 1 hour at room temperature. Next, DMF (25 mL) solution of iodomethane (2.8 mL) was added dropwise at 0° C., and the mixture was stirred for 20 hours at room temperature. The reaction mixture was poured into ice water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and thereafter the residue obtained by distilling off the solvent under a reduced pressure was purified with silica gel column chromatography (BZ-127ZH, n-hexane:ethyl acetate=7:3), to give the captioned compound (9.0 g, 86%) as crystals.

1. stirringthe mixture was stirred for 20 hours at room temperature
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. customthe residue obtained
5. distillationby distilling off the solvent under a reduced pressure
6. customwas purified with silica gel column chromatography (BZ-127ZH, n-hexane:ethyl acetate=7:3)