“…MP: 4250 1C. 1 H NMR (400 MHz, CDCl 3 , d ppm): 7.52 (s, 3H, Ar-H), 7.50 (d, 6H, J = 8 Hz, Ar-H), 7.39 (d, 6H, J = 4 Hz, Ar-H), 7.37 (d, 6H, J = 4 Hz, Ar-H), 6.63 (d, 6H, J = 8 Hz, Ar-H), 3.69 (s, 9H, OCH 3 -H); 13 Compound 7. BBr 3 (2.8 mL, 2.8 mmol, 1 M in CH 2 Cl 2 , 10.5 equiv.)…”