toluene-4-sulfonic acid (R)-8-bromo-2,3-dihydro-benzo[1,4]dioxin-2-ylmethyl ester 、
4-甲氧基-2-甲基苯硼酸 以400 mg (90%) was obtained as a colorless oil的产率得到toluene-4-sulfonic acid (R)-8-(4-methoxy-2-methyl-phenyl)-2,3-dihydro-benzo[1,4]dioxin-2-ylmethyl ester