反应详情

Treatment of 4-chloro-2-methoxyphenol (30.0 g, 0.19 mol) with sodium hydride (9.1 g, 0.23 mol, 60 wt. %) and allyl bromide (27.46 g, 0.23 mol) followed by treatment of the resultant allyl ether in refluxing mesitylene generally according to the procedure described for Intermediate 8 gave 2-allyl-4-chloro-6-methoxyphenol as a yellow oil. Treatment of 2-allyl-4-chloro-6-methoxyphenol with sodium hydride (7.08 g, 0.177 mol, 60 wt. %) and benzyl bromide (30.27 g, 0.177 mol) generally according to the procedure described for Intermediate 13 provided 1-allyl-2-(benzyloxy)-5-chloro-3-methoxybenzene as a pale yellow oil. Treatment of the olefin (35.5 g, 0.123 mol) of with AD-mix-α (132.0 g) generally according to the procedure described for Intermediate 2 gave 35 g (54%) of (±)-3-[2-(benzyloxy)-5-chloro-3-methoxyphenyl]propane-1,2-diol as a white solid. mp. 65-68° C. Anal. calcd. for C17H19ClO4: C, 63.26; H, 5.93. Found: C, 65.29; H, 6.23.