A. Georgieva, E. Stanoeva, S. Spassov
1991
Citations
0
Influential Citations
14
Citations
Journal
Tetrahedron
Abstract
Abstract The reaction of α-chloroimines 1 - 3 , resp. 11 with homophthalic anhydrides 4 leads to the formation of the isoguinoline ring system incorporated in furo[3,4-c]isoquinolinediones 8 - 10 , resp. 13a-(chloromethyl)-8H- dibenzo[a,g]-quinolizine-8-one-13-carboxylic acids 12 . The latter compounds were converted into furo[3′ 4′:9,9a]dibenzoquinolizinediones 13 under basic conditions. NMR studies provided information concerning the relative configuration and the solution conformation of the various heterocycles obtained. The molecular structure of 8b and 12b was determined by X-ray analysis.