Synthesis of (2E)‐2‐methyl‐3‐(4‐{[4‐(quinolin‐2‐ylmethoxy)phenyl]sulfanyl}phenyl)prop‐2‐enoic acid (VUFB 20609) and 2‐methyl‐3‐(4‐{[4‐(quinolin‐2‐ylmethoxy)phenyl]sulfanyl}phenyl)propanoic acid (VUFB 20584) as potential antileukotrienic agents