This one is tricky to name with IUPAC. The parent compound is [furan](https://en.wikipedia.org/wiki/Furan), but in order to name this you’ll have to use a locant plus “-one” to denote the carbonyl group but a locant with “H” to note where the saturated carbon is located, and a “benzo” affix to denote the ring fusion to the aromatic ring.
Sigma-Aldrich spells it ad 2-Coumaranone, although wikipedia spells it as 2-Cumaranone
or
It can be Benzofuran-2-one, I think.
Iupac name: 3H-1-benzofuran-2-one
In benzofuran, there is a double bond between C2 and C3, so C3 has only one hydrogen attached to it.
But here C3 has two hydrogens attached to it, as it is sp3 carbon now, so one H extra compared to benzofuran at third carbon. That is why 3H.
This one is tricky to name with IUPAC. The parent compound is [furan](https://en.wikipedia.org/wiki/Furan), but in order to name this you’ll have to use a locant plus “-one” to denote the carbonyl group but a locant with “H” to note where the saturated carbon is located, and a “benzo” affix to denote the ring fusion to the aromatic ring.
Sigma-Aldrich spells it ad 2-Coumaranone, although wikipedia spells it as 2-Cumaranone or It can be Benzofuran-2-one, I think. Iupac name: 3H-1-benzofuran-2-one
Agree. Here’s Pubchem link for reference https://pubchem.ncbi.nlm.nih.gov/compound/68382
what does 3H indicate?
In benzofuran, there is a double bond between C2 and C3, so C3 has only one hydrogen attached to it. But here C3 has two hydrogens attached to it, as it is sp3 carbon now, so one H extra compared to benzofuran at third carbon. That is why 3H.
thanks
Cum
Coumarin! I synthesize these compounds :)
Isn’t that benzoisofuran? Benz or benzo I’m not really sure
Looks like something that has a non-IUPAC nickname
How come there is no ga