3-Hydroxymethyl-5-(2,3-O-isopropylidene-β-D-erythro-furanosyl)-2-methylfuran (2) prepared from 3-ethoxycarbonyl derivative 1 was converted to 3-chloromethyl-5-(2,3-O-isopropylidene-β-D-erythro-furanosyl)-2-methylfuran (3). Compound 3 reacted with cytosine, adenine, 6-chloropurine, 6-mercaptopurine, and nicotinamide to corresponding optically active heterocyclic derivatives 5-10 and 14. The 6-chloro derivative 9 was converted to 6-alkoxy derivatives 11 and 12 by the reaction with methanol or ethanol, respectively, in the presence of diazabicyclooctane. Dithionite reduction of quaternary chloride 14 gave 1,4-dihydropyridine derivative 15 capable to transform ethyl phenylglyoxylate to optically active ethyl mandelate.
从3-乙氧羰基衍
生物1制备的3-羟甲基-5-(2,3-异丙基-β-D-赤霉糖醛酸酯)-
2-甲基呋喃(2)转化为3-
氯甲基-5-(2,3-异丙基-β-D-赤霉糖醛酸酯)-
2-甲基呋喃(3)。化合物3与
胞嘧啶、
腺嘌呤、
6-氯嘌呤、6-巯基
嘌呤和烟酰胺反应,得到相应的光学活性杂环衍
生物5-10和14。6-
氯衍
生物9通过与
甲醇或
乙醇在二氮杂
环辛烷的存在下反应,转化为6-烷氧基衍
生物11和12。对夸塔二
氯化物14的二
亚硫酸盐还原产生1,4-二氢
吡啶衍生物15,能够将
乙基苯乙酰乙酸酯转化为光学活性的乙基曼德酸。