反应详情

800 mg (2.63 mmol) of 4-(1,3-benzodioxol-4-yl)-2-hydroxy-4-methyl-2-(trifluoromethyl)pentanal is stirred in 5.2 ml of glacial acetic acid with 389 mg (2.63 mmol) of 4-amino-2,3-dihydroisoindol-1-one overnight at room temperature. The reaction mixture is spun in until a dry state is reached, and the residue is chromatographed on a Flashmaster. 725 mg (62.8%) of the desired compound is isolated as a racemate. Racemate cleavage (Chiralpak AD 20μ; mobile solvent: hexane/ethanol/diethylamine) yields 279.2 mg of the (+)-enantiomer {[α]D=+20.7 (c=1.03, methanol)} and 297.5 mg of the (−)-enantiomer {[α]D=−23.4 (c=1.02, methanol)}

1. customthe residue is chromatographed on a Flashmaster