Diisopropylethylamine → HCID 68676237, compound

Participants

Reaction Steps

2.36 g of trimethyloxonium tetrafluoroborate are added batchwise to a solution of 3.52 g of 1-acetyl-3-[1-hydroxy-1-(3-iodo-phenyl)-methylene]-6-chloro-2-indolinone (educt VII) and 2.72 ml of ethyldiisopropylamine in 80 ml dichloromethane and the mixture is stirred for one hour at ambient temperature. Then another 1.4 ml ethyldiisopropylamine and 1.2 g trimethyloxonium tetrafluoroborate are added and the mixture is stirred for a further two hours at ambient temperature. Then it is extracted with water, the organic phase is dried over magnesium sulphate and evaporated to dryness. The residue is recrystallised from ether and dried in vacuo at 80° C.

Provenance & Evidence