Asymmetric hydrolysis of (±)-1,2-diacetoxy-3-chloropropane (1) with a very small amount of a lipoprotein lipase gave (S)-1 of 90% enantiomeric excess (e.e.). Reactions of (S)-1 with phenols in an alkaline condition yielded the corresponding (S)-3-aryloxy-1,2-propanediols. From (S)-3-(1-naphthoxy)-1,2-propanediol (5) was synthesized the optically pure (S)-isomer of propranolol [1-isopropylamino-3-(1-naphthoxy)-2-propanol] (9), one of the ²-adrenergic blocking agents. Hydrolysis of (±)-1,2-diacetoxy-3-bromopropane (11) and (±)-1,2-diacetoxyethylbenzene (12) with the lipase afforded (S)-11 of 77% e.e. and (R)-12 of 73% e.e., respectively.
用极少量的
脂蛋白脂肪酶对(±)-1,2-
二乙酰氧基-3-
氯丙烷(1)进行不对称
水解,可得到对映体过量率为 90% 的(S)-1。在碱性条件下,(S)-1 与
酚类反应生成相应的(S)-3-芳氧基-
1,2-丙二醇。由(S)-3-(1-
萘氧基)-
1,2-丙二醇(5)合成了
普萘洛尔的光学纯(S)-异构体[1-异丙基
氨基-3-(1-
萘氧基)-2-
丙醇](9),它是²-
肾上腺素能阻断剂之一。用
脂肪酶水解(±)-1,2-
二乙酰氧基-3-
溴丙烷(11)和(±)-1,2-
二乙酰氧基
乙基苯(12),可分别得到(S)-11 和(R)-12,(S)-11 为 77%,(R)-12 为 73%。