Ethyl (7Z)-retinoate 5 has been efficiently synthesized using as key step t
he Suzuki coupling of an in situ generated alkenylboronic acid and the geom
etrically homogeneous tetraenyliodide with (Z)-geometry, itself obtained by
yodomethylenation according to Stork's conditions. Functional group manipu
lation then afforded (7Z)-retinal 7.