2,3-dihydro-3-<(phenylmethoxy)methyl>-1,4-dioxino<2,3-b>pyridine 、
氢气 在
钯 乙醇甲醇混合物 、 intermediate 2-a 、
(R)-3-hydroxymethyl-2,3-dihydro[1,4]dioxino[2,3-b]pyridine 作用下,
以
甲醇 为溶剂,
以yielding 4.06 g of (S)-2,3-dihydro-1,4-dioxino[2,3-b]-20 pyridine-3-methanol (intermediate 2-a) ([α]D20=−34.33°; c=25.34 mg/5 ml in methanol) and 3.81 g of (R)-2,3-dihydro-1,4-dioxino[2,3-b]-pyridine-3-methanol (intermediate 2-b) ([α]D20=+32.740; c=22.60 mg/5 ml in methanol)的产率得到