Abstract
Dihydropyrrolo[2′,1′:3,4]pyrazino[2,1-
a]isoindolones
10a–
10c
were obtained in 76–81% yields by the reaction of 2-(1
H-pyrrol-1-yl)ethylamine
8
with 2-formylbenzoic acids
9a
,
9b
or 2-acetylbenzoic acid
9c
via
N-acyliminium cation aromatic cyclizations. Similarly, dihydropyrrolo[2′,1′:3,4][1,4]diazepino[2,1-
a]isoindolones
12a
,
12b
were prepared in one-pot reactions from 3-(1
H-pyrrol-1-yl)propylamine
11
and 2-formylbenzoic acids
9a
,
9b
.
Graphic