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I'm having a hard time deciphering it's IUPAC name like I have 4-butanoxy and 3-propanoxy so far, but how do you put it all together with the double-bonded oxygen?

Thank you and really sorry for the trivial question here.

  • 1
    $\begingroup$ This is an acid derivative. Try to identify the acid first. $\endgroup$
    – Loong
    Feb 24 at 12:49

1 Answer 1


The motif in the center is carbonic acid, hence your compound is a carbonate as for instance dimethyl carbonate. (Perhaps the BOC group is known to you as a protection of amines, too.)

To the left of the acid you have a butyl rest, to the right an ethyl. You sort them alphabetically, and hence name the compound butyl ethyl carbonate, CAS 30714-78-4.

  • $\begingroup$ The CAS name list also allows ethyl butyl carbonate, without the alphabetical sorting. $\endgroup$ Feb 24 at 14:40
  • $\begingroup$ Thank you very much! This was really helpful :DD $\endgroup$ Feb 25 at 5:48
  • $\begingroup$ @OscarLanzi Perhaps equally allowed (as on the CAS site itself), true. On the other hand, a methyl and an ethyl group on atom 3 of a pentane - this is (preferred?) as 3-ethyl-3-methyl-pentane. The brief 4-page abstract of the Red Book names MEK as as ethyl methyl ketone, too (page 4, right hand column). $\endgroup$
    – Buttonwood
    Feb 26 at 21:01
  • $\begingroup$ @idontknowhowtocode The Red Book (and other material about chemical nomenclature) is compiled in the resources page. $\endgroup$
    – Buttonwood
    Feb 26 at 21:03

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