反应详情

To a solution of 2.0 gm (15.1 mMol) 5-amino-1H-indole in 25 mL tetrahydrofuran were added 2.4 mL (17.2 mMol) triethylamine. The reaction mixture was cooled in an ice bath as 1.23 mL (15.9 mMol) methanesulfonyl chloride were added dropwise. After 3.5 hours the reaction mixture was partitioned between 1N sodium hydroxide and ethyl acetate. The organic phase was extracted twice with 1N sodium hydroxide. All sodium hydroxide phases were combined, adjusted to pH=5 with acid and extracted well with ethyl acetate. These organic phases were combined, washed sequentially with water and saturated aqueous sodium chloride, dried over sodium sulfate and concentrated under reduced pressure to give 3.0 gm of a purple solid. This solid was crystallized from cyclohexane/ethyl acetate to give 2.5 gm (78.6%) of the title compound as light purple crystals.

1. additionwere added dropwise
2. customAfter 3.5 hours the reaction mixture was partitioned between 1N sodium hydroxide and ethyl acetate
3. extractionThe organic phase was extracted twice with 1N sodium hydroxide
4. extractionextracted well with ethyl acetate
5. washwashed sequentially with water and saturated aqueous sodium chloride
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated under reduced pressure