1. The mixture of acids obtained on the oxidation of
4:11 -dibromofluoranthene has been shown to consist
of 2:7- dibromofluorenone -l- carboxylic acid and
6- bromofluorenone -l- carboxylic acid. The structure
of the latter was proved by its decarboxylation to
2. The action of diazomethane on fluorenone acids in
presence of methanol has been investigated.. The
ring enlargement to substituted 9- phenanthrols,
noted by previous workers, has been confirmed.
3. The reduction of 4:11 -dibromofluoranthene to 1:2:3:4 - tetrahydrofluoranthene has been accomplished.
4. The synthesis of 4:11 -dicarboxyfluoranthene from
4:11 -dibromofluoranthene was successfully accomplished.
This di -acid was shown to be different from that
obtained during Friedel- Crafts reaction on
5. The tribromofluoranthene, obtained on the bromination
of 4:11 -dibromofluoranthene, has been shown, both by
degradation and by synthesis, to be 4:11:12-tribromofluoranthene.
6. 4:5- Dibromophthalic acid was prepared by the oxidation
of 4:5- dibromo -o- xylene and shown to be identical
with one of the oxidation products of 4:11:12-
tribromofluoranthene, thereby proving the structure
of the latter,
7. The nitration of 1:2:3:4 -tetrahydrofluoranthene gave
two products, which were shown to be 1- hydroxy -2-
nitro- 1:2:3:4 -tetrahydrofluoranthene and its
dehydration product, 2- nitro- 3:4- dihydrofluoranthene.
8. The dehydrogenation of 2- nitro -3:4- dihydrofluoranthene
to 2- nitrofluoranthene has made easily accessible
fluoranthene compounds substituted in the 2-
position. which are otherwise difficult to obtain.
9. The nitration of 5- bromo- 1:2:3:4- tetrahydrofluoranthene
also gave two products which are the bromo-analogue6
of those obtained in the nitration of 1:2:3:4 - tetrahydrofluoranthene.
10. The synthesis of 1:2- benzfluorene has been
accomplished, starting from ß - 1- fluorenonepropionío