What is the IUPAC name of the following compound?

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  • $\begingroup$ The preferred IUPAC name is (5  E)-N-(prop-2-en-1-yl)oct-5-enamide. Please add details to isolate your problem and to narrow the answer set. $\endgroup$ – user7951 Oct 11 '15 at 9:56


Start by looking for the longest continuous carbon chain. That's 8 carbons giving you the oct-.

On that chain, theres an alkene at the 5 position, and an amide at the end, giving the 5-enamide. You might also write this as 5-en-1-amide, though it is implied.

The geometry of the alkene as being (E) always goes to the front of the string, as would any R or S declarations. In this case, (E) is unambiguous, but in cases where multiple points of geometry exist, you would define geometry or stereochemistry along with position (5R),(3E) etc.

So, thus far you have E-oct-5-enamide. You now need to describe the other group bound to nitrogen on the amide, this is an allyl group, providing you with the full name (E)-N-allyloct-5-enamide.

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