Hydrazine hydrate (1:1) → 1-amino-3,3-bis(4-pyridinylmethyl)-1,3-dihydro-2H-indol-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution consisting of 3,3-bis-(4-pyridinylmethyl)-1,3-dihydro-1-[(phenylmethylene)amino]-2H-indol-2-one (7.84 g) and absolute ethanol (68 ml) was added hydrazine hydrate (6.4 ml). The resulting mixture was heated at reflux for 5.75 hours, followed by cooling to 0° C. The product crystallized upon cooling. Filtration and washing with ether-pentane afforded 2.50 g of 1-amino-3,3-bis(4-pyridinylmethyl)-1,3-dihydro-2H-indol-2-one.

Provenance & Evidence