Water → HCID 19842260, compound

Participants

Reaction Steps

N-(4-methoxyphenyl)-4-nitrophthalamide (12 g) was suspended in a mixture of methanol (80 ml) and tetrahydrofuran (80 ml) and, under ice-cooling and stirring, sodium borohydride (1.6 g) was added. Water (300 ml) was added to the mixture and crude crystals were collected by filtration to give a mixture (11 g) of 3-hydroxy-2-(4-methoxyphenyl)-5-nitroisoindolin-1-one and 3-hydroxy-2-(4-methoxyphenyl)-6-nitroisoindolin-1-one. The mixture (6.0 g) thus obtained and piperidinocarbonylmethylenetriphenylphosphoran (9.3 g) were dissoleved in toluene (200 ml) under heating, and the solution was refluxed for 3 hours. After cooling, crystals separated were collected by filtration and recrystallized from toluene to give 2.2 g of 2-(4-methoxyphenyl)-6-nitro-3-piperidinocarbonylmethylisoindolin-1-one.

Provenance & Evidence