Сн3-сн2- сн2-сн2-он->ch3- ch2 - ch2-ch2-br ->ch3 -ch2 -check=ch2-> сн3-сн2-сн2он-сн3

ch3-ch2-ch2-ch2-oh+kbr=ch3-ch2-ch2-ch2-br+kohch3-ch2-ch2-ch2br+naoh спиртов раствор = nabr+h2o+ch3-ch2-ch=ch2ch3-ch2-ch=ch2+h2o=ch3-ch2-choh-ch3