反应详情

(2R)-1-(Benzyloxy)hex-4-en-2-ol (C9) (150 g, 0.73 mol) was converted to the product according to the method used for synthesis of ({[(2R)-2-(2,2-diethoxyethoxy)pent-4-en-1-yl]oxy}methyl)benzene (C2) in Preparation P1, except that the initial combination of reagents was carried out at 0° C. The product was obtained as a brown oil (400 g, ≦0.73 mol), which was used for the next step without further purification. By 1H NMR analysis, this material contained a roughly 1:1 mixture of geometric isomers. 1H NMR (400 MHz, CDCl3), characteristic peaks for product: δ 7.25-7.38 (m, 5H), 5.38-5.60 (m, 2H), 4.55 and 4.55 (2 s, total 2H), 2.22-2.37 (m, 2H), 1.60-1.68 (m, 3H).

1. customwas carried out at 0° C