反应详情

Dess-Martin periodinane (2.78 g, 6.56 mmol) was slowly added to a stirring 0° C. solution of 3-hydroxymethyl-azepane-1-carboxylic acid benzyl ester (146) (1.2516 g, 5.02 mmol) in CH2Cl2 (18.2 mL). The reaction was stirred for 1 hour until the reaction was judged complete by HPLC. The reaction was concentrated in vacuo, and a minimal amount of CH2Cl2 was added. Et2O was added to precipitate the periodinane by-product, and the reaction was filtered, concentrated, and immediately purified through an automated silica gel column with 1:1 Hexanes:EtOAc to obtain pure 3-formyl-azepane-1-carboxylic acid benzyl ester (147) (0.3086 g) in 62% yield.

1. concentrationThe reaction was concentrated in vacuo
2. additiona minimal amount of CH2Cl2 was added
3. additionEt2O was added
4. customto precipitate the periodinane by-product
5. filtrationthe reaction was filtered
6. concentrationconcentrated
7. customimmediately purified through an automated silica gel column with 1:1 Hexanes