The present invention relates to the novel compounds Methyl 2-[(3S)-[3-[(2E) (7-chloro quinolin-2-yl) ethenyll phenyl]-3-halopropyl] benzoates (IV) wherein the halo is chloro, bromo, iodo, starting from the known compound Methyl 2-[(3S)-[3-[(2E)-(7-chloroquinolin-2-yl) ethenyl] phenyl]-3-hydroxypropyl] benzoate (1). Reaction of Methyl 2-[(3S)-[3-[(2E) - (7-chloroquinolin-2-yl) ethenyl] phenyl]-3-hydroxypropyl] benzoate (1) with thionyl chloride or with methane sulfonyl chloride - lithium bromide or with trimethyl chlorosilane - sodium iodide in presence or absence of base gives Methyl 2-[(3S)-[3-[(2E)-(7-chloro quinolin-2-yl) ethenyl] phenyl]-3-halopropyl] benzoates.
