Hydrochloric Acid → HCID 58386371, compound

Participants

Reaction Steps

1.0 g (5.4 mmol) 3-cyclopropylmethylene-1,3-dihydro-indol-2-one were placed in 50 mL THF. 12 mL (12 mmol) 1M borane in THF was slowly added dropwise. The reaction mixture was refluxed for 3 h. After cooling to RT 10 mL methanol and 15 mL semi-concentrated aqueous hydrochloric acid solution were successively added dropwise and then the mixture was refluxed for 3 h. After cooling to RT it was extracted with EtOAc. The aqueous phase was made alkaline with aqueous 4M sodium hydroxide solution and extracted once again with EtOAc. The organic phase was dried, filtered and evaporated down.

Provenance & Evidence