3-[1-(chloroacetyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-1-[(2-chloropyridin-4-yl)methyl]-5,5-dimethylimidazolidine-2,4-dione → 1-[(2-chloropyridin-4-yl)methyl]-3-[1-(N-isopropylglycyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-5,5-dimethylimidazolidine-2,4-dione

Participants

Reaction Steps

A solution of 1.426 g of 3-[1-(chloroacetyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-1-[(2-chloropyridin-4-yl)methyl]-5,5-dimethylimidazolidine-2,4-dione obtained in stage j) of Example 3 in 25 mL of isopropylamine is refluxed for 4 hours. The reaction mixture is then concentrated under reduced pressure and the residue is taken up in 30 mL of water and triturated in 2 mL of diethyl ether. A solid forms, which is filtered off, washed with twice 5 mL of diisopropyl ether and dried to give 1.2 g of 1-[(2-chloropyridin-4-yl)methyl]-3-[1-(N-isopropylglycyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-5,5-dimethylimidazolidine-2,4-dione, the characteristics of which are as follows:

Provenance & Evidence