反应详情

To a solution of 5-methoxyindoline-2(R/S)-carboxylic acid methyl ester (1.5 g, 7.23 mmol) and N-t-butoxycarbonyl-2(S)-aminobutyric acid (1.62 g, 7.96 mmol) dissolved in dried dichloromethane (15 ml) under nitrogen at 10° C., was added diisopropylcarbodiimide (1.00 ml, 7.96 mmol). The mixture was stirred at room temperature for 24 hours, then filtered. The filtrate was evaporated under vacuum to afford a brown solid which was purified by column chromatography on silica gel using dichloromethane as eluent. A white foam was obtained which was the mixture of two diastereomers.

1. filtrationfiltered
2. customThe filtrate was evaporated under vacuum
3. customto afford a brown solid which
4. customwas purified by column chromatography on silica gel
5. customA white foam was obtained which
6. additionthe mixture of two diastereomers