Compounds of formula (I), wherein R
1
and R
2
are, independently of one another, H,C
1
-C
6
alkyl, C
1
-C
6
halogenalkyl, C
1
-C
6
alkoxyl, C
1
-C
6
alkoxy-C
1
-C
6
alkyl, or C
1
-C
6
alkoxy-C
1
-C
6
alkyloxy, and R
3
is C
1
-C
6
alkyl, are obtainable in high yiedls by stereoselective addition of R
3
-substituted propionic acid esters to R
1
- and R
2
-substituted benzaldehydes of formula R—CHO to form corresponding 3-R-3-hydroxy-2-R
3
-propionic acid esters, conversion of the OH group to a leaving group, subsequent regioselective elimination to form 3-R-2-R
3
-propenic acid esters, and reduction to corresponding 3-R-2-R
3
-allyl alcohols and their enantioselective hydrogenation, wherein R is (a).
式 (I) 的化合物,其中 R
1
和 R
2
分别为 H、C
1
-C
6
烷基、C
1
-C
6
卤代烷基、C
1
-C
6
烷氧基,C
1
-C
6
烷氧基-C
1
-C
6
烷基,或 C
1
-C
6
烷氧基-C
1
-C
6
烷氧基,以及 R
3
是 C
1
-C
6
烷基,可通过 R
3
-取代的
丙酸酯与 R
1
- 和 R
2
-式 R-CHO 的取代
苯甲醛,形成相应的 3-R-3-羟基-2-R
3
-
丙酸酯,将羟基转化为离去基团,随后进行区域选择性消去,形成 3-R-2-R
3
-
丙烯酸酯,并还原成相应的 3-R-2-R
3
-烯丙基醇及其对映选择性氢化,其中 R 为 (a)。