It was used in the synthesis of (9Z,12E)-[1-13C]-octadeca-9,12-dienoic acid and(9Z,12Z,15E)-[1-13C]-octadeca-9,12,15-trienoic acid. Application 7-Bromo-1-heptanol was used in the synthesis of (9Z,12E)-[1-13C]-octadeca-9,12-dienoic acid and(9Z,12Z,15E)-[1-13C]-octadeca-9,12,15-trienoic acid. It can be used to prepare N-substituted [(carboxymethyl)phenoxy]ethyl benzoxazinones as PPARγ agonists and antidiabetic (type 2) agents. It can also be used to prepare thiochroman and chroman derivatives as pure antiestrogens.