反应详情

温度

80 °C

To 2.75 g (9 mmol) 5-(5-Hydroxy-pentyl)-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester in 100 ml CH2Cl2, 0.87 ml (11 mmol) methanesulfonyl chloride and 3.8 ml (27 mmol) triethyl amine were added at 0° C. The solution was concentrated in vacuo to yield crude 5-(5-Methanesulfonyloxy-pentyl)-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester as yellow viscous oil, MS: 384 (MH+). The crude material was dissolved in 5 ml DMF and 5 ml (50 mmol) N-allylmethylamine. The mixture was heated to 80° C. for 3 h, concentrated and the residue was dissolved in water and ether, 2N NaOH was added and the inorganic phase was extacted with ether. The combined organic phases were washed with water and dried over Na2SO4. Column chromatography on silica gel with CH2Cl2/MeOH 9:1 yielded 2.5 g (72%) 5-[5-(Allyl-methyl-amino)-pentyl]-2,3-dihydro-indole -1-carboxylic acid tert-butyl ester as colorless liquid, MS: 359 (MH+).

1. concentrationThe solution was concentrated in vacuo
2. customto yield crude 5-(5-Methanesulfonyloxy-pentyl)-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester as yellow viscous oil, MS
3. concentrationconcentrated
4. dissolutionthe residue was dissolved in water
5. additionether, 2N NaOH was added
6. washThe combined organic phases were washed with water
7. dry with materialdried over Na2SO4