Sup guys & gals, I've got a problem most chemists dread to solve: constructing more-or-less correct names for some compounds. This is not for a test or exam, no bonus points are to be had, all anyone's getting is a pat on the back, a warm feeling in the gut and a nagging doubt in the brain for having spent time on this instead of something useful.
I've gone through relevant CAS and IUPAC (the Blue Book) rulesets, but while they manage to explain a lot, they fail in explaining how to combine substituents with multiply fused ring systems. On top of that, my class of compounds doesn't have any official nomenclature yet (carbahelicenes have, heterahelicenes do not, except for Balaban nomenclature, which no one uses so I'm not bothering with it).
I've attached the relevant images, so here goes: compound 0 is commonly known as tetrathia[7]helicene, or more elaborately, 3,6,9,12-tetrathia[7]helicene. This is the basis from which we start.
The names I've come up with are:
Bis(4,5-bis(octyloxy)benzo)[1,2-e:1’,2’-o]tetrathia[7]helicene 1
Ethyl bis(4,5-bis(octyloxy)benzo)[1,2-e:1’,2’-o]tetrathia[7]helicene-9-carboxylate 2
1-methyl-pyrrolo-2,5-dione[3,4-j]bis(4,5-bis(octyloxy)benzo)[1,2-e:1’,2’-o]tetrathia[7]helicene 3
Now, this last one is most certainly wrong, but I'm unsure as to how go further from here. Anyone with any experience in the matter?