Stannous Chloride → 7-amino-5-(o-fluorophenyl)-1,3-dihydro-1,3,3-trimethyl-2H-1,4-benzodiazepin-2-one

Participants

Reaction Steps

1.5 g (0.0044 mol) of 5-(o-fluorophenyl)-1,3-dihydro-1,3,3-trimethyl-7-nitro-2H-1,4-benzodiazepin-2-one are dissolved in 15 ml of concentrated hydrochloric acid, treated with 3.3 g of tin (II) chloride and stirred at room temperature for 15 minutes. The reaction mixture is poured into a mixture of ice and soda solution and extracted with methylene chloride. After drying and evaporating the organic phase, the residue is recrystallised from ether. There is obtained 7-amino-5-(o-fluorophenyl)-1,3-dihydro-1,3,3-trimethyl-2H-1,4-benzodiazepin-2-one of melting point 190°-191°.

Provenance & Evidence