1,1'-Carbonyldiimidazole → 2-(1,3-benzodioxol-5-yl)-2-(1,3-dihydro-1,3-dioxo-isoindol-5-yloxy)-N-(4-tert-butylphenylsulfonyl)acetamide

Participants

Reaction Steps

A solution of 1 g of 2-(1,3-benzodioxol-5-yl)-2-(1,3-dihydro-1,3-dioxoisoindol-5-yloxy)acetic acid and 0.71 g of carbonyldiimidazole in 100 ml of THF is heated at 60° for 2 hours. 0.93 g of 4-tert-butylbenzenesulfonamide and 0.67 g of 1,8-diaza-bicyclo[5.4.0]-undec-7-ene are then added and the mixture is stirred for a further 1 hour at this temperature. After customary working up, 2-(1,3-benzodioxol-5-yl)-2-(1,3-dihydro-1,3-dioxo-isoindol-5-yloxy)-N-(4-tert-butylphenylsulfonyl)acetamide, m.p. 215°, is obtained.

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