R. Schindler, G. Mokrov, A. M. Likhosherstov
Nov 1, 2008
Citations
0
Influential Citations
5
Citations
Journal
Heterocycles
Abstract
- 2,5-Dimethoxy-2-(dimethoxymethyl)tetrahydrofuran 1 reacted with anthranilic acid alkyl esters 2 in boiling acetic acid to give 2-(2-formylpyrrol-1 -yl)benzoic acid esters 3. The reductive amination of 3 with primary arylalkylamines 4 led to 2-{2-[(arylalkylamino)methyl]pyrrol-1-yl}-benzoic acids esters 5. Heating of the aminoesters 5 in xylene under reflux resulted in 5-(arylalkyl)-4,5-dihydro-6H-pyrrolo[1,2-a][1,4]benzodiazepin-6-ones 7. Lactams 7 were reduced by lithium aluminum hydride in toluene and ether solutions to give 5-(arylalkyl)-5,6-dihydro-4H-pyrrolo[1,2-a][1,4]benzo-diazepines 8. The solid products 8 were recrystallized and the liquid ones were transformed into their salts with oxalic acid.