A facile synthesis of 2,3-azaisoindoline

2,3-Azaisoindoline (4) was prepared via reaction of dichloride 11 with 2,4-dimethoxybenzyl amine followed by deprotection with trifluoroacetic acid and triethylsilane. Isolation of the unstable 2,3-azaisoindoline 4 was facilitated by conversion to the bis-HCl salt.